Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5103271433b109…

MALICIOUS

PDF

92.3 KB Created: 2020-08-01 19:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0aa170756ff4f15ee2e12fec34781d9 SHA-1: bcec631c83896044f87213669ac6aff4ade08408 SHA-256: ad5103271433b10966fbee670fdf99f788ac39a4173cab474824a69f170d580c
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm for SEO manipulation or phishing. One of the embedded URLs, https://ttraff.ru/pify?keyword=tom+hiddleston+imdb, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=tom+hiddleston+imdb
    • http://files.healthypetspetpro.com/uploads/1/3/1/8/131856851/mexepi.pdf
    • http://files.herveybaywhalecity.com/uploads/1/3/2/7/132710783/lufonaxomeme_bijutor.pdf
    • http://files.livbeauty.net/uploads/1/3/1/4/131406234/5494262.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/11024689029.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3695/files/36040466596.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/67787857713.pdf
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/92685959563.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/78625119633.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/jubesijajaxixem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/fafowepok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/34005271630.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/xapojoruzeririsigir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/bijusawazomusali.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/87077062437.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/janazeduponapuxox.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/gezugudikimenawolowamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b1.bin
485e8bf2e5c11819596e843a282135c418ad009171cb628df23a94e1c6c8a27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 8344 bytes
font_01_sfnt_off00011e83.bin
69404cf2101c6c5f60c5b29217aaed468f1e3fc95a00227c709371c83843dcfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 4636 bytes
font_02_sfnt_off00012e17.bin
d969b6a618369e06bc3156aac0d7e3402fe44b5f6906c7124510f30d031304e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 11296 bytes
font_03_sfnt_off000154bd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154BD 4324 bytes

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