Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f048503e3abca96…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 20:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51d7d4357bcdb4f93a6cb506d724972b SHA-1: 75e46a1b62ea19c72a6c67e9fd971d81ce30d670 SHA-256: 1f048503e3abca966ec40a7d46a7f42c9114bbe72ac847aee8bf1cf652283dbe
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to insurance and manuals, suggesting a lure to disguise the malicious links. The presence of a 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, likely for SEO manipulation or to host further malicious content. The 'SE_CALLBACK_LURE' heuristic suggests a potential for callback phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=infinity+insurance+cambodia+annual+report In PDF document text
    • http://setati.ghbeyondsurvival.com/uploads/1/3/1/3/131379182/83d7300977b4fe.pdfIn PDF document text
    • http://files.teachingbeth.com/uploads/1/3/1/3/131379268/zatizek.pdfIn PDF document text
    • http://files.tludramaticmedia.com/uploads/1/3/1/3/131383380/lijapenirubijib.pdfIn PDF document text
    • http://files.blueridgeracing.net/uploads/1/3/1/3/131381555/gikulolewimiser.pdfIn PDF document text
    • http://files.calpars.com/uploads/1/3/2/7/132740951/mofugowulax_wogiro_gikiverusani.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/1/0435/9992/1315/files/chrysler_voyager_2002_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/50526812818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9978/1288/files/binomische_formeln_bungsaufgaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1920/5789/files/game_controller_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/papotapibubogutovisus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/3394833302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/mulapak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7308/9186/files/acculturative_stress_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/ielts_speaking_all_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/traditional_approaches_to_the_study_of_political_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/92426268146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/pinegizomo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 5480 bytes
SHA-256: af9594465705ce19e8cd0f47d07e99c4eb5d3a01e716733a77d98f1a8dcf28c8
font_01_sfnt_off000075a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 11212 bytes
SHA-256: b09043c65af04f76c1448521d5f796d05e31d52b1d00b8801e98904a714caa01