Malicious PDF — malware analysis report

Static analysis result for SHA-256 1673f8c11c827390…

MALICIOUS

PDF

47.0 KB Created: 2020-08-19 09:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dcbbd4e0f551eec09282ceb51a6ab8c SHA-1: db0343de7139e2d97053bed012441cd4e0722a93 SHA-256: 1673f8c11c827390f7b14e58f634d256de6ba50c1cbb6c063cb95a48b6e32b93
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 designed for SEO manipulation. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The embedded link directs to a known malicious redirector, suggesting the document's purpose is to facilitate further malicious activity, such as phishing or malware distribution.

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.cc/pify?keyword=free+antivirus+for+my+android+phone In PDF document text
    • http://files.tateliberaswanson.com/uploads/1/3/1/4/131411688/3546704.pdfIn PDF document text
    • http://files.efccc.net/uploads/1/3/1/0/131070313/luxawapofomu.pdfIn PDF document text
    • http://sezabag.claudechandlerartist.com/uploads/1/3/0/9/130969742/putugoxoviwe.pdfIn PDF document text
    • http://zulon.qmhiconsulting.com/uploads/1/3/0/7/130775918/woveperoraw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/gusijiwabidutaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/xemuligefabuponanolupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/xoxasunoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/kewekuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/knock_knee_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/dilapovakarututatape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/hematology_lab_equipment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/57876421694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/jatidikaroxiruzusuxusobod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/totil.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://scripts.sil.org/OFLIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7878 5368 bytes
SHA-256: c97cf5a02aeeb3d7274b5018508494286c754d7af9e55780401590de717dc322
font_01_sfnt_off00008a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9B 10720 bytes
SHA-256: abbd4caaf30a68a6f17d0667164d880601486273ea165b2853c7dd7daa085b98

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