Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c73ff63ebd21f3…

MALICIOUS

PDF

69.1 KB Created: 2020-08-08 21:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 626c4c47be689232066c8ba80736d89c SHA-1: ce795698981fc369e2aa232ef02a0875cb016578 SHA-256: f4c73ff63ebd21f33db7f71b79aac270a698d55bcc9abfe15dc3249756d972ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam campaign. The document body text and embedded links point to a lure related to 'supplementary feeding pdf'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=supplementary+feeding+pdf In PDF document text
    • http://files.vahana.ca/uploads/1/3/1/6/131637374/4f7b54e4319be.pdfIn PDF document text
    • http://fotifufav.glenrockarboretum.org/uploads/1/3/1/1/131164239/9439527.pdfIn PDF document text
    • http://files.crossroadscounsellingcentre.com/uploads/1/3/1/3/131379815/868b46c53de70a6.pdfIn PDF document text
    • http://files.ccapsummerinstitute.com/uploads/1/3/0/7/130775645/8a8df2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/lekamozofukamiwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/sodegapawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1918/1985/files/jebijajizitip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/63874246330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/7658813943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/47600251777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/7179369410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/homes_around_the_world_oxford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/42218920950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/voxenok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/43470196049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/manitomawolibod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/bovoxemimibisovebunoki.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d235.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD235 20144 bytes
SHA-256: 930eaba1b398b58d3632e87118eac91e6b1a10ad86a18e067caf1f41134b6020
font_00_sfnt_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 6476 bytes
SHA-256: 03555527ea29160e8e1ab9690ccd6a8e377a843017d8aa2f5f9eb10b71f53ddd
font_01_sfnt_off00007ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 5388 bytes
SHA-256: c198143ba01e4c063efa184a6ac5b555520d23f128c619c6efc49c0c3a2fd1fc
font_02_sfnt_off00009131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9131 7112 bytes
SHA-256: c5e9daad761c53e072f2e352d1a6bff2f68e6661815ac30d097576c88e380365
font_03_sfnt_off0000a48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48F 14304 bytes
SHA-256: 8b8968ed9e5b38df6cd52420a7d2f4247b23ff0ce6236d88cc713636ad4e4c38
font_05_sfnt_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5112 bytes
SHA-256: 8723dc86c0dc32c864fe2062a87f0040f44150548bfbbcfd44a7a12d43c60b08

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