Malicious PDF — malware analysis report

Static analysis result for SHA-256 177f924f72bdf888…

MALICIOUS

PDF

33.7 KB Created: 2020-08-23 20:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e7e6c7fc4c1f5c6ed92f163ee0b433e SHA-1: d68cb5ada2af8593324e39d0b874a31642992e2f SHA-256: 177f924f72bdf888a354a56ecfebe0bdebd0e9ef5187852b87267c94000fb206
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link directs to 'ttraff.cc', a known redirector, which then attempts to lead the user to content related to 'chasing cars piano sheet music free pdf'. This suggests a tactic to lure users to potentially malicious or ad-heavy sites, likely for financial gain or further compromise. The presence of a large number of external links further supports the link farm classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=chasing+cars+piano+sheet+music+free+pdf
    • http://boludi.mhannahrawlings.com/uploads/1/3/1/0/131070420/09a3f547.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/79488306718.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/sidunojabumese.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/zopew.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/minecraft_dark_oak_mansion.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4893/files/usr_share_dict_words.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/gigowegolafugiwawumexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/botawus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/xujixidemov.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_off000045e5.bin
c1f830fe91a657684fd551cfcfc98a2e6aa30482a4a4427231c7fe35dab7255d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E5 5440 bytes
font_01_sfnt_off00005831.bin
31e20a6603242c57114492bb2fac74133bcbe60c3d7762c8e101a2d7e5d49ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5831 10028 bytes

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