Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f39c0b9770b9eb…

MALICIOUS

PDF

40.2 KB Created: 2020-09-10 10:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e2763f2d95ed1ec395b9aab3a9f76fc SHA-1: de50054a159e61b6524806c9a718f1e827622a04 SHA-256: c7f39c0b9770b9ebe15954fd55e119a93636fb11566574a8f82d787b7a007cd0
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for search engine optimization, aiming to trick users into clicking on it. This link leads to a redirector that likely serves further malicious content. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm designed to improve search engine ranking for malicious URLs.

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.club/wix?keyword=gmail+dark+mode+android+10+pixel+3 In PDF document text
    • http://lafix.helpatexasteacher.org/uploads/1/3/1/4/131453133/4628070.pdfIn PDF document text
    • http://files.lthinchrist.org/uploads/1/3/2/6/132681482/1d940951ddcdc.pdfIn PDF document text
    • http://files.positivelifetransformations.com/uploads/1/3/1/6/131637273/bexerexekali-nivoxef-worowexako.pdfIn PDF document text
    • http://tasefewe.niosha.com/uploads/1/3/1/6/131637021/b5aef1ec61.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/1/0437/5805/9671/files/uti_signature_attested_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/65447362477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/vumefiviji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/nasanemiminezogoxigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/dell_latitude_e6400_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/bodybuilding_exercises_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/55027898344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/6445968534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/tagefisek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/66528478248.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 5448 bytes
SHA-256: c4e46d1a72a3b67bedcd313786b05cadfdae069153e7861ba4da5064592e153b
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10012 bytes
SHA-256: ea12b8bb472d901be16841b737c60f7a572c281cfcc2952390ba30b3c9de06ee

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