Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aafd661c9f9346f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-25 13:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df34196f0d2c3008ff601d722102561f SHA-1: be1205e0c0f4b4134bc2259a402c8a1139d31986 SHA-256: 0aafd661c9f9346fc2fc67b843a813d44d54bb4509c44d989b8026aea083267e
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to job applications and a URL that matches the malicious redirector, suggesting a phishing or scam lure. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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.
  • 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=noc+application+format+for+applying+job
    • http://jupadube.kellyhowellphoto.com/uploads/1/3/1/8/131856080/sixigosuluge_futexiwi_bemoguluwuxam_bufem.pdf
    • http://files.betreatedwell.com/uploads/1/3/1/3/131398362/6703297.pdf
    • http://files.theselfpublishingstudio.com/uploads/1/3/0/9/130969334/d9bdaf4b15.pdf
    • http://files.kerengans.com/uploads/1/3/2/3/132303172/tozijopo.pdf
    • http://files.villalta-artgallery.com/uploads/1/3/2/6/132680974/nimanevorifej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/97895355241.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/bumesofawo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/malux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/business_process_documentation_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/form_w-_4v.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/30938986199.pdf
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/32590666853.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/62295613925.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006164.bin
161c2e0fa7ed891fd26c79b6703b1a9a7d0361f66eecc8c0b190eaa836d9ab47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5444 bytes
font_01_sfnt_off000073dd.bin
6a307bf21b598cfcf62488d358b69a16e856d78ea8592e7e3235cc9736b32ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 9808 bytes

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