Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cfd95603413d40…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 09:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd70985ccec24816655878517b1de5d9 SHA-1: cad5c84976b0c343c6c00798fe7a3aa92741ea09 SHA-256: c1cfd95603413d400a55681f2962d437461f13cb90c713e4d5fec0f43fef0b2e
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, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Android for windows 7 32 bit' and the malicious URL, suggesting a lure for a fake download. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=android+for+windows+7+32+bit
    • http://noxixot.rhinotruckparts.co.uk/uploads/1/3/0/8/130815009/pokavefi-natevugodow-wufog.pdf
    • http://files.premierbeachpropertymanagement.com/uploads/1/3/1/1/131164095/9030500.pdf
    • http://files.normangosney.co.uk/uploads/1/3/1/8/131858481/kevog-defabudi-demivudokamiw-fekiwu.pdf
    • http://files.riversidees.com/uploads/1/3/1/4/131483025/rososatizusiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/arbeitszeugnis_formulierungen_verhalten_gegenber_vorgesetzten.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/45687600204.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/zibabibonixu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/l_blends_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/72690144366.pdf
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/29989715567.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/85259529156.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/ribof.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_off000067fb.bin
c3e514fe844071d53acfe41caadbe7ba312b74dbc1f87cb9262e87156f31f609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 5256 bytes
font_01_sfnt_off00007a06.bin
01283879ea2639f0e7d94994cf3445ef51fd67fd97fefba3d9d6adf8314f2419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 10084 bytes

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