Malicious PDF — malware analysis report

Static analysis result for SHA-256 06919f58c027c815…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 22:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09e518ad62ac6b910f46b56c9ce4d4c SHA-1: b26709b7803481f0bcc0a8f4ca0cc84093637f57 SHA-256: 06919f58c027c81557e357ba2509a7f6c272fb12d0e3ba19bbde25c841af0470
174 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with one redirecting to a known malicious domain. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a potentially harmful site 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=the+abilene+paradox+the+management+of+agreement+pdf
    • http://files.uoflphisigmarho.com/uploads/1/3/0/7/130775292/vanasi-jiputaginadur.pdf
    • http://files.mosspropertymgmt.com/uploads/1/3/0/7/130740316/jusorikepese.pdf
    • http://files.msbronson.com/uploads/1/3/1/8/131858044/6367112.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/before_i_fall_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/77003609815.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/23579285784.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/minecraft_rpg_servers_with_classes_and_races.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/38612603844.pdf
    • https://cdn.shopify.com/s/files/1/0448/5450/9729/files/dream_a_little_dream_of_me_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/jusiko.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/kezajapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/55555569034.pdf
    • https://cdn.shopify.com/s/files/1/0428/5772/6118/files/16301866388.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_off00007303.bin
808b577754dca2e9583acfcd42d8b0a7d13fb8697cb81929e23be5feae77e6c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 5432 bytes
font_01_sfnt_off00008556.bin
fabc9a738fa52ac377a24f628156ae6ae97faa8fdca6617d557f37bbaa5ac2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 10152 bytes

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