Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1af7964fd274e5…

MALICIOUS

PDF

51.1 KB Created: 2020-08-01 19:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66b2459f6dcd38896d0a08cff5f44454 SHA-1: c3c9cd6db6e339a6eff084d9b29c4c189576712e SHA-256: 3b1af7964fd274e504c5c1b73c6237e22664843a4d333a8297166f42dcda75c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains multiple embedded links, with one specifically pointing to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'Saints Row 4 character creation' and a URL that appears to be a lure. The presence of a PDF redirector link and a large number of external PDF links suggests an attempt to drive traffic to potentially malicious content or a link farm.

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=saints+row+4+character+creation In PDF document text
    • http://files.yfyliveguam.org/uploads/1/3/1/4/131438509/5135785.pdfIn PDF document text
    • http://files.michellejnettles.com/uploads/1/3/2/8/132816042/rezudunowukisipofum.pdfIn PDF document text
    • http://files.eternalskytravel.com/uploads/1/3/1/3/131384113/5611582.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/1/0439/1020/1499/files/64848905902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/22197064833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/88590312351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/mamewexetalito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/93331886344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/71762698556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/26816003036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/google_docs_profit_and_loss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/vagaludiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/povenasu.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 8

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_off00007f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F43 5136 bytes
SHA-256: cf14ec0d04519fbaf2dcf576ebf5ef07effe49905968d3bdf0d0f516a2beb345
font_01_sfnt_off000090ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 15428 bytes
SHA-256: 2f3f4990420f444d5c9ff960742d900d30e803233a49dce8eb7ddde859bf06af

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