Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3df4ebdd9932f19…

MALICIOUS

PDF

50.6 KB Created: 2020-08-21 09:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1068cf7fb7a16d3239243c620d080e4b SHA-1: b7253bac78e77c1c3d729f0912251a77c20e8c23 SHA-256: a3df4ebdd9932f19f3236418f650cdc5b5fb432a33746c57b9f42d333aa82ee1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'dihydrogen monoxide safety data sheet'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to known malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML classifier also 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=dihydrogen+monoxide+safety+data+sheet In PDF document text
    • http://files.katie-alexander.com/uploads/1/3/1/4/131437276/436f92babddf1.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/1/0434/9706/2564/files/80875875620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/clipsal_pvc_conduit_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/lumakozuwedevasasibiner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/zirodonen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/87286131156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/zubatali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/73543898685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/duxisesunoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/lanuratev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/41995684356.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_off00008336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 5460 bytes
SHA-256: 66f9c5a5b29158b8ae42c0b144db558b8cc5f370194c9450ca734755af6f09c9
font_01_sfnt_off000095a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A8 12308 bytes
SHA-256: 9fbf039c381cc6ba9b101c5765db0ea5ddbc4ab7aa7ab6b05d7150e2f9c4e1da

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