Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d7c192e68d377a…

MALICIOUS

PDF

39.5 KB Created: 2020-08-03 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94922ee98b933714e199ec8f18a9a139 SHA-1: a03c9a6704b3a36bdef81d83bd9bb5a44c744adf SHA-256: 76d7c192e68d377ad1cf2ccceebb86d7051c448bbba86b77037ef7afc6bfc4cc
174 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains references to 'John deere 4710' and a URL that appears to be part of a link farm designed to host other PDFs. The presence of a callback lure heuristic suggests a phishing or scam attempt, likely aiming to redirect users to malicious sites or solicit information.

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=john+deere+4710
    • http://files.presstovalet.com/uploads/1/3/0/7/130739002/4812291.pdf
    • http://files.allthingsartstudio.com/uploads/1/3/0/7/130739776/xikiguzokiz.pdf
    • http://files.saltlakeconference.com/uploads/1/3/1/6/131636654/3996100.pdf
    • http://files.graceceremonies.com/uploads/1/3/1/4/131453206/9f120f4.pdf
    • http://files.bestconcordiapodcast.com/uploads/1/3/0/7/130776573/1152967.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/xoxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/12050737572.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/40266517661.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/rejorarurisa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/53068710994.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/nulupopokaselik.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/nj_dmv_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/maxusurudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/62292425813.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/jovujosasojubipixaxo.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_off000052b9.bin
2ef12dfc48be855eea29c13f59187e61c54e92c810b3a5dbe3a7e87e25129c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B9 4844 bytes
font_01_sfnt_off00006338.bin
606bbe9c71f84dd373f6036a0212ff131026e56d0e168caabde8d466cd66994a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 14236 bytes

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