Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f44a738f9aa1c33…

MALICIOUS

PDF

38.5 KB Created: 2020-08-07 05:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 078a905eab239d9d98da9221645d10e2 SHA-1: d4dfd2613e191de6ef86b93ae39202f3b4035658 SHA-256: 9f44a738f9aa1c331cc8d2d54f3d1d8a66136293b1fbe30f5b64298383c3c00a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/wb?keyword=blackberry%20playbook%20manual%20pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=blackberry%20playbook%20manual%20pdf In PDF document text
    • http://files.2skypattaya.com/uploads/1/3/2/7/132710671/vozofuju.pdfIn PDF document text
    • http://files.newmoses.com/uploads/1/3/1/6/131637308/b315bf8d5e.pdfIn PDF document text
    • http://files.paxtonchapelchurch.com/uploads/1/3/0/7/130775959/lezokif.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/1/0440/1148/7397/files/tevadapufefegabipiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/86421944414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/caudillismo_en_latinoamerica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/xugagof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6288/5541/files/govugavakofevodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/74519383715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/5th_edition_dungeon_master_s_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/vapatewosiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/wevovizetegad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.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_off00004b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5B 5232 bytes
SHA-256: cfca594a5357a4beebb391aa85f2d2729aa683a47785e906fd6acb9040fed99c
font_01_sfnt_off00005d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D09 10128 bytes
SHA-256: bbb2c1d6d43839ca3ccc55e0710774fc9650c3ead136ba56a3beee1ec411d1c8
font_02_sfnt_off00007f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F67 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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