Malicious PDF — malware analysis report

Static analysis result for SHA-256 27abd8fd2e6491f2…

MALICIOUS

PDF

52.6 KB Created: 2020-08-14 18:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c7341d00f0f6aa4b4de789b33dd8d83 SHA-1: 833fd9bc7ca03c398be27522e8cf52310e54aade SHA-256: 27abd8fd2e6491f2eb9da86b61b138c1cb5037c8b2bfda21044b6881e2aeb34f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=political+platform+definition+ap+gov'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the intent to redirect the user.

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.com/pify?keyword=political+platform+definition+ap+gov
    • http://files.aliciaarmeli.com/uploads/1/3/1/4/131453215/1320718.pdf
    • http://files.axevmc.com/uploads/1/3/0/7/130775734/vekejodaxulipug-jitegane-gekibibuwowope-ruzivorubeti.pdf
    • http://sozus.sistersinlaws.com/uploads/1/3/2/7/132710657/9030906.pdf
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874347/joditamodajomik-wevawegakid-suvobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/99094437441.pdf
    • https://cdn.shopify.com/s/files/1/0435/5591/3879/files/39041470209.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/79830878638.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/75589712987.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/fuzajiloritafuwuzaxovozi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5769/0262/files/theological_wordbook_of_the_old_testament.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/9350938094.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/verexuzazomarabozidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/80314033042.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/37706305171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/donebajedexikupetinipufo.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_off00008f7f.bin
4efe62d990e6017c2103e482374c1b57b4e477ebb3b08170829aa34ca64ea989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7F 5360 bytes
font_01_sfnt_off0000a1a5.bin
02b1b678dba40b2708a9681ae992adbe6edfc703a436945824bc8fe93de6a144		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A5 10388 bytes

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