Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced7f890af6b3725…

MALICIOUS

PDF

31.5 KB Created: 2020-08-31 19:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ad7a524b3575b986a457638535bb98 SHA-1: 0a1887c394e8fcf23852852d1c47bfe1e16dd920 SHA-256: ced7f890af6b372571d5e829e5451411a6f6eaf8f4a0d10f6fb7062f915e477e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/pify?keyword=twins+babies+pics'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same malicious URL.

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.me/pify?keyword=twins+babies+pics
    • https://static.usrfiles.com/ugd/b8c837_bc34b2d855ee421aa43f0491a8a22b25.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_a2ba2b2e55874c90893722d8424dc487.pdf
    • https://static.usrfiles.com/ugd/b8c837_25543622b9ae4d07bb1ea74336628cf4.pdf
    • https://static.usrfiles.com/ugd/b58d21_0721e850a53c42cdaa833fe708d0e43d.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/jagejinem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/drawing_tablet_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1738/files/avatar_comics.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/65807335601.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/39365828738.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/sap_crystal_reports_2016_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/fundamentals_of_agricultural_economics.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000416f.bin
46f376867f7f3bee37ee6db605570f3c87b3cc7423a7162b2b07fa7786d32007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x416F 4980 bytes
font_01_sfnt_off00005284.bin
e21c68c5cc6b1593a133494470e87ffca934e53d2161180a6d023df52a6ed3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5284 9320 bytes

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