Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa11bfa0e4169ea5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 05:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e006dc054fa23e1f310497fe846d082 SHA-1: 8450aba388a4bc3f5b21a9c29035f306400ac759 SHA-256: aa11bfa0e4169ea5d5b5617748c7db2858928ebb07aa57d350b214984ccdcb85
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=medical+microbiology+textbook+pdf+download In PDF document text
    • http://files.mayflowerimporters.com/uploads/1/3/1/4/131453177/607d74f0136c34.pdfIn PDF document text
    • http://files.mesoamericancalendarstudies.com/uploads/1/3/1/4/131438176/kulozoretaranusaz.pdfIn PDF document text
    • http://files.zepedamillan.com/uploads/1/3/0/8/130813781/f21155f5.pdfIn PDF document text
    • http://files.blissfulnurturing.com/uploads/1/3/1/8/131872079/judikapigatopame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/dajifatokofibixutotelose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/dekaxomijomiluvesap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/vorikuwimimasuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/ubuntu_shut_down_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/92994690135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/laguribimunuvemusupekar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/piboxetupenijawukuloxitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/46799576923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/30920909932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/bizinalapezitofanokiwatog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F65 5556 bytes
SHA-256: b911b485f5e7cbc375fb3c86666055e64d05defeedd3050cbc565c0baf45b6d8
font_01_sfnt_off0000624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 9496 bytes
SHA-256: 6c81b32bd86da26f8660807924b2d9a2964b7da9ea8017c4ea47907d72f002c3
font_02_sfnt_off000082ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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