Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f9a8276fd75057…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 23:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2acca801bb270a60c725c456936fcf4e SHA-1: 71bc56ce5e01eed4de0a9fac1b4da88ea5f19634 SHA-256: 60f9a8276fd75057bd7fc09b9d9e75655ff0d28b840617786b0287856422fe8a
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, includes the target URL and references IFRS 4 standards, suggesting a lure to disguise malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to lead users to potentially harmful content, likely for phishing or malware distribution.

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/wb?keyword=ifrs%204%20standards%20pdf
    • http://gexumux.vanessayoung.net/uploads/1/3/2/6/132682076/neroluru_zidojawe.pdf
    • http://files.mtcreekfarm.com/uploads/1/3/1/8/131871488/6c18e220.pdf
    • http://tavexa.jamestownlivestock.com/uploads/1/3/1/4/131407406/sejubusosupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/81839375760.pdf
    • https://cdn.shopify.com/s/files/1/0448/0411/2545/files/battery_charging_methods.pdf
    • https://cdn.shopify.com/s/files/1/0428/4783/0183/files/94838037523.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/cover_letter_for_teacher_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/34662088479.pdf
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/bolt_tightening_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/ahmet_cevdet_paa_ve_mecelle.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0327/files/81206545917.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/87218014188.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/75420634019.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/matrix_organizational_structure.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/cognitive_development_in_late_adulthood.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/lunibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/angularjs_viewer_npm.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c44.bin
395f9cd3bdb7c736727a0373efaef9dcfd4dff9c65fef6201996f4d07f93d096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 5028 bytes
font_01_sfnt_off00007d65.bin
b783188157a3de6b1a1a195d96e9e3e5a78c5fa77f3acadcd9a912231279d9e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 1940 bytes
font_02_sfnt_off0000869d.bin
fd66d66b34bcaa5cf5857e19bd2e2ca6b081fe9ddcbd93d64c7de9cd81a5d9c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 10624 bytes

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