Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef2d643df33ca6e…

MALICIOUS

PDF

48.3 KB Created: 2020-08-11 08:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7777e71c6d0c247af1be157dbd660e9 SHA-1: d0b2df51de9529178093aa3b4c420a321cd04702 SHA-256: 7ef2d643df33ca6e8cf740351eee238755415f5c0848ea934b4809260ca2f4c6
222 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, includes text suggesting a lure for 'Deloitte aptitude test questions and answers pdf'. The presence of multiple SEO-optimized PDF links further indicates a phishing or scam attempt, likely to download a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=deloitte+aptitude+test+questions+and+answers+pdf In PDF document text
    • http://files.christineleunens.com/uploads/1/3/1/3/131398195/vuxezakanu_belope.pdfIn PDF document text
    • http://kefad.yourprojectupdates.com/uploads/1/3/0/8/130813747/lozup.pdfIn PDF document text
    • http://files.artglassforumny.org/uploads/1/3/0/7/130740264/vizivitifazinamezi.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/1/0437/1070/9915/files/physics_lab_manual_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/95342646812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/kibanigufoluwuzeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/32859735901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/94993131829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/jivewokepapumonekup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/34866295388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/85997998940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6874/9979/files/29094459447.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 5136 bytes
SHA-256: fd257c77bb51d57ee6f8abf778d60198fcedf27253eb0f73e9fb8fa8bfe8bf7b
font_01_sfnt_off00008303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 10356 bytes
SHA-256: 8ae6aa7c24d7301689c36f99c4994b6942882bff6c112b35a1e7b0493cc4071f
font_02_sfnt_off0000a629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA629 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378