Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4fa389335a199c…

MALICIOUS

PDF

50.8 KB Created: 2020-08-09 03:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cff8b58e2af3d1188b7de5888763afd4 SHA-1: e4694d08541aa513630f34682c7fcbf56116163f SHA-256: fc4fa389335a199cea35826ac6839f10f947ec3e48fcceb48308b6971e24f60e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs, suggesting it's a primary lure. The ML classifier strongly flagged this PDF as malicious.

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=sda+28+fundamental+beliefs+pdf In PDF document text
    • http://files.copenhagentalent.com/uploads/1/3/0/7/130739260/4153518.pdfIn PDF document text
    • http://files.winstonmillerconstruction.com/uploads/1/3/0/8/130813330/5d60245d18b.pdfIn PDF document text
    • http://files.depedmisor.net/uploads/1/3/1/6/131636930/144b6986b111f2c.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/1/0437/2067/1384/files/logituxewonut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3661/3544/files/govejur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/tavomebafewebigenagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/bunuvalewiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/23528721436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/24384112885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/python_remove_spaces_from_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8805/5191/files/sejarah_berdirinya_bani_umayyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/91105189269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/mercado_livre_de_energia_eltrica.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 2

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_off00008822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8822 5660 bytes
SHA-256: f0632b545919859f275cc474675a16c1e07d05682a86d7723a04d232dcd24eac
font_01_sfnt_off00009b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 10160 bytes
SHA-256: 06cabdb744d8103f08277bc4dfdd307ba3f5e670c717097f300034ea3d65bc3d

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