Malicious PDF — malware analysis report

Static analysis result for SHA-256 94abd01983b2bbe3…

MALICIOUS

PDF

50.4 KB Created: 2020-08-30 03:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 557a834151a4e2635aed557e6beafbd8 SHA-1: f55fb41819217c8c0a7bac43fa22c97ed9efb450 SHA-256: 94abd01983b2bbe3fd9b5cada31bcaad5f02cb34b3456db620f42ba2fe6728ec
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated but contains the same malicious redirector URL and numerous links to external PDFs hosted on static.usrfiles.com. This suggests a campaign focused on SEO manipulation or redirecting users to malicious sites.

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/wix?keyword=east+meets+west+yang+liu In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_d43b9d72a22f4b1aab18cf727348924d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9757e7_12d992e50af9425f929f5708c7b5dbc3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1be480_51a6491715ca4bcdb59fcaa52f5a6eab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5cf23b_a52b2908a294455bb92d0e5324814dd5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/191a6d_a8023d2d51c249ceabd1343dfe38761d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dd4472_89f19546559e4aada4091803e32a77ff.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d55797_c1ce244d373b44b7be1e59e864c1d10a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c8c6c_644cce46b9eb4f9489126321e86d9a56.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9694/7353/files/xogesipiseneduzekod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/heine_borel_theorem_proof.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b85eb0_f352102d3c6e42d0877652a70c55a6e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d49cddcac9fe473ba4c0d60ba5c2a61f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7306e_6c9fbae5643941a3bc99e8914d7cd7b3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fb53133584154903b1f367876c521722.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/affb4a_3479b469203d48b2bae7be51a09c9de5.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 5060 bytes
SHA-256: b7587d6a87b01e26029c53e46190e2baae75b361630ee3481d3e82ffbfe701ad
font_01_sfnt_off00008ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAD 2284 bytes
SHA-256: d64340b15287c056ecc73f7633c35ed589b75f78d9041c43f06e2711d127cdd4
font_02_sfnt_off000098ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EC 10272 bytes
SHA-256: 458542af2ac7860bd0368c52be81033b3457d793a768afbce106ddb2db7aa201

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