Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2535e65d1eea3f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 15:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f4158f2628275615bfcb45f6bb3e1d SHA-1: a058ad128b840c1c921f3bc5fb1c673a4bbe64b2 SHA-256: 1b2535e65d1eea3fb29e3d224a19e7b7cbba65d3c12ef009ea1813a392697382
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=carte+de+visite+format+pdf. The document body, though heavily obfuscated, contains references to 'carte de visite format pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to download further content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=carte+de+visite+format+pdf
    • http://jekeli.cleftpupbrigade.org/uploads/1/3/1/3/131379578/df37e9c4e2.pdf
    • http://files.shareourlove2017.ca/uploads/1/3/0/8/130874125/4999351.pdf
    • http://files.trentonbadillophotography.com/uploads/1/3/1/4/131406739/6706247.pdf
    • http://momibenoj.christineshanks.com/uploads/1/3/2/7/132712207/kinosifide_pubewiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/50056353248.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/34720275234.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/79525766416.pdf
    • https://cdn.shopify.com/s/files/1/0435/5185/0647/files/annotate_ipad_dropbox.pdf
    • https://cdn.shopify.com/s/files/1/0447/0187/6377/files/97_nissan_altima.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/88716302979.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/84610333289.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/najojowajesuwoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/16295005439.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/98579094108.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_off000068f9.bin
60799d66c2bf9b39fc583d7842232b8a016f57586de8fc05e6bfda7e7b1ad8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 5120 bytes
font_01_sfnt_off00007a53.bin
8b4145238a6667d5c76b3ed263933d814213867def611de580ca0ebb47eb4d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 12084 bytes

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