Malicious PDF — malware analysis report

Static analysis result for SHA-256 6817af07bdca3260…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 20:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d421328ff540fab0aa24f3a66c323900 SHA-1: ed1c8fa00b0d2d72fc79c12be04fc1d209391e16 SHA-256: 6817af07bdca3260355996e4b61409ffebe3962ffbe283e810ec5d1c9e3f9bad
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a redirector to malicious infrastructure. The document body, though partially obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to direct users to potentially harmful websites, 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.cc/pify?keyword=torque+wrench+calibration+procedure+pdf
    • http://netan.bcarrollconsulting.com/uploads/1/3/0/7/130738720/vagixolimireji.pdf
    • http://files.kevinbennettjr.net/uploads/1/3/1/4/131406390/mexebirak.pdf
    • http://files.wildroseworkingbelgians.com/uploads/1/3/1/4/131437044/nipewofewalefux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/63052282607.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/fumowafojaxuwazaxisin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/importance_of_biosecurity_in_poultry_farming.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/62617639721.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/que_es_calidad_total_en_una_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/vevisirofexagikiketi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/bypass_capacitor_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/bezigolawawawagilujona.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/wisitij.pdf
    • https://cdn.shopify.com/s/files/1/0453/2836/7771/files/cristianismo_primitivo_y_religiones_mistricas.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/vozojeledobizix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/guzalevijus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/function_of_autonomic_nervous_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/50964659124.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_off00006044.bin
6a8000942d29625ee27f728ba65f84276985f2ab55dfa52294d4237dacd9b961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 5372 bytes
font_01_sfnt_off0000728b.bin
bb93bb36261e6522a43a6809d8905bb8b9415c160982af7f996acbbf941798d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728B 9868 bytes

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