Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e92524933a3ec6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-05 05:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1cbf131bf1f2016e95a5ce18b71e07e SHA-1: 3571228a2fa70e4b64b31904d12a8f4cc6d02205 SHA-256: 67e92524933a3ec64ded5547d8dddf367455a6a1baa0935cb384f05e45fe3c8f
194 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. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document content is designed to trick users into changing payment details. The presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to phishing or financial fraud.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=problems+on+payback+period+pdf
    • http://files.poorhousecandles.com/uploads/1/3/2/7/132740930/xomozili.pdf
    • http://files.xanderclaypool.com/uploads/1/3/0/9/130969386/a08969dca3a6.pdf
    • http://bilurix.tylerjamesfisher.com/uploads/1/3/2/8/132816202/dusozaxigiloba.pdf
    • http://wosekidud.kaylapongrac.com/uploads/1/3/2/8/132815002/414633.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/povopuzoxupubije.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/datoxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdf
    • https://cdn.shopify.com/s/files/1/0433/5163/8175/files/safix.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/zawojexuxepin.pdf
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/11312645685.pdf
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/bhagavad_gita_slokas_in_telugu_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/3d_gun_models.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/mutexulupobito.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/cambridge_medical_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4847/files/air_pollution_effects_on_plants.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/50643393096.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_off00006eb8.bin
a93ced6c8d7f581aa4181e50bd7f39758699719a0efd278df290779e6705cc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 5608 bytes
font_01_sfnt_off000081b8.bin
f7a439d02ab65df462df055782a32eb8de7948ab693cafa4bc8e5ae068b345b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 10324 bytes

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