Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f87ba42baa76df0…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 02:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01421801c5014d1eb37d958823996c1d SHA-1: 43d4157c5e2fc2ed064e0f0673331c736ccc368e SHA-256: 7f87ba42baa76df043e671914ca1c150fff84bf71cab9a5cd3646853799c6688
174 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a malicious redirector at ttraff.ru, disguised as a beverage industry magazine. This suggests a link farm or phishing attempt designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=beverage+industry+magazine+pdf
    • http://files.biocharireland.com/uploads/1/3/1/3/131380000/07192d2b060a.pdf
    • http://files.reigninspain.org/uploads/1/3/0/7/130739704/a6afada4fe21f.pdf
    • http://files.wildandwoolyworld.com/uploads/1/3/2/6/132682663/5e73712d2095.pdf
    • http://files.dashingdoodlesnc.com/uploads/1/3/0/8/130813887/619295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/fuxavivo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4686/files/php_print_array.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/kerajadesetiruvadojijet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/organelles_in_eukaryotic_cells_pogil_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51730359377.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/rockbox_ipod_classic.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/91388953464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/80935189528.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/68700301516.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_off0000644c.bin
61363f080d82bbb74965de7ff405fe980a59617a07a847fb6ab97ecb0b6c04f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5588 bytes
font_01_sfnt_off0000775e.bin
1bee567887ffcc1575feace6fde4a38b5caeb227bef8f0ea3fcdef439aa1f76f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 10948 bytes

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