Malicious PDF — malware analysis report

Static analysis result for SHA-256 921c4f8d1d3b9a63…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 10:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2b2efd2f1a501e84907e2374d25c1e0 SHA-1: 325a80deb244fd129fc1c3401cef5dbe56d8767b SHA-256: 921c4f8d1d3b9a63f3005c265bc3bd01772f1d468ba2b4cd466244635445fcf1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though obfuscated, contains text related to a Sony camera manual and the wkhtmltopdf tool, suggesting a lure to a potentially unrelated malicious site. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=sony+dsc+w830+manual In PDF document text
    • http://files.nancyjocullen.net/uploads/1/3/0/9/130968961/0df4f5a14f45afb.pdfIn PDF document text
    • http://files.cmyonce.com/uploads/1/3/1/4/131455463/2169386.pdfIn PDF document text
    • http://files.dadempire.com/uploads/1/3/1/4/131453214/lijevuxeluj_palamilo_xexavarimova.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/1/0437/2014/7095/files/24186473660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/95287677757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/susewinitojoxarogobaboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/dinazerezovororawijof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/65528882239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/99056139519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/31133931664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/48821482292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3697/files/70484106459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/my_curse_killswitch_engage_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/15869897364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/6157277549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/riwubimidojupixavubimora.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 3

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_off00004a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A97 5784 bytes
SHA-256: e383ebb96c04c10587df43f1afae76a79d726fbda0c01106e8f0e69927b599c8
font_01_sfnt_off00005e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 9892 bytes
SHA-256: 1ef98daaee2b4909ed6741090bc26cc463b4088ce91bccf3fa5326dcb6e7af1f

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