Malicious PDF — malware analysis report

Static analysis result for SHA-256 764f78d65fdf18d5…

MALICIOUS

PDF

40.7 KB Created: 2020-08-17 17:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2fd2dbd4f0a2cb59cdaf2146e9d77c8 SHA-1: 1fc27a81d19a9b6d7315450fa0f879e658a5b89c SHA-256: 764f78d65fdf18d5efd17ecbb7323bb5168f6c6bc152f1cdf931bdb9cf67425f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body and embedded link data suggest a lure related to 'Alsager school uniform suppliers', likely a phishing pretext. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to drive traffic to malicious sites, potentially for further exploitation or credential harvesting.

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.com/pify?keyword=alsager+school+uniform+suppliers In PDF document text
    • http://files.3531developments.com/uploads/1/3/1/3/131398573/wakelik.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/1/0435/2085/2122/files/69458172267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/1314829929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/ashab_e_kahf_story_in_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/path_dependence_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/tefagifofawefuxogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/tejut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/85151253813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/mopitugejirifujojigaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/saxon_algebra_1_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8070/3399/files/99198995010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/apostrophe_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/barisan_bilangan_real.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
🗂 Part of campaign: 3531developments.com 3 samples

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_off0000608d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608D 5420 bytes
SHA-256: 4eda0a295ed81e9cfd017b203da9b8896cee65f14d64c565bd1d873a46f1d470
font_01_sfnt_off000072cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 10352 bytes
SHA-256: 24d27c273c21ecb59218f99145cc99a79cedc59d32a94e4a28d8bbe45d28c242

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