Malicious PDF — malware analysis report

Static analysis result for SHA-256 7670bb7933494b87…

MALICIOUS

PDF

42.2 KB Created: 2020-09-10 03:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b38c04af24051286dc77344baee008c3 SHA-1: 3f339450527c1abc750668aec3f48a2d4f858c78 SHA-256: 7670bb7933494b876233f2261b95ecdbd48bf2a8dec03ec96a72b0fa56f507a0
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically identified as a malicious redirector and an SEO link farm. The document body, though heavily obfuscated, contains text suggesting a lure related to a "bowling ball buyers guide" and includes the malicious redirector URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or scam attempt.

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.link/wix?keyword=bowling+ball+buyers+guide In PDF document text
    • http://files.harvestfieldbaptist.org/uploads/1/3/1/0/131070309/5069351.pdfIn PDF document text
    • http://files.letschoosejoy.com/uploads/1/3/0/7/130775934/gerorepeputibuj.pdfIn PDF document text
    • http://files.mammologix.us/uploads/1/3/2/6/132696210/3204733.pdfIn PDF document text
    • http://sobalupi.consolidatedpropertyservices.org/uploads/1/3/1/0/131070786/gatapikovukokebuwug.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/1/0448/0725/8269/files/pattern_recognition_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/78205364435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8198/1347/files/camera_lenses_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/vagiselisafasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/nilojidowasawejefujig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/53441990421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/135178_6263bee6e9f741e8baaffef8e847ba52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcc11b_9bc64c11370641bba47f98ced9b97610.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8c2e83_187c78656d7247ca8299a221fa7b2ffd.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 8

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_off00006689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 5376 bytes
SHA-256: d1fd3f80308b202ade90cb788bda5d8963d54754b5bb5455b236dd5f6a842044
font_01_sfnt_off000078f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 10312 bytes
SHA-256: de40bd500218b03f41528bfb680498eba159f154b7fc0001f4d6fce0900fa80e

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