Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71f913ae579be57…

MALICIOUS

PDF

57.8 KB Created: 2020-08-07 23:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97eb0c139283bd0e2f79814aa8e09cf7 SHA-1: 68747ef5f515d215eba9d4716378f2be777855bd SHA-256: a71f913ae579be57a873a50561b8d1f8ff934b1f0d56d071ced5b1ac3ea227f8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body text and embedded links are designed to lure users into clicking on these malicious URLs, likely leading to further malware downloads or phishing pages.

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=log+and+antilog+table+pdf+file+download
    • http://files.darlingterracepublishing.com/uploads/1/3/1/4/131453395/fizatitebixowiwenini.pdf
    • http://files.thcofe.org/uploads/1/3/1/8/131856757/5215631.pdf
    • http://files.lesprihaitimission.com/uploads/1/3/1/8/131856627/nokuxerago-fawuwo.pdf
    • http://files.trans-it.org/uploads/1/3/0/8/130874109/37718c1f55c.pdf
    • http://files.calvarylutheranscottsbluff.org/uploads/1/3/1/4/131453636/8528074.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/selokalolezemoxinej.pdf
    • https://cdn.shopify.com/s/files/1/0431/2688/2471/files/jafazozaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/34055260855.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/sefuzegused.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/jisezekisef.pdf
    • https://cdn.shopify.com/s/files/1/0446/2179/1395/files/hernia_hiatal_tratamiento_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0434/1592/8997/files/38582233581.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/fallout_3_railway_rifle.pdf
    • https://cdn.shopify.com/s/files/1/0440/1099/5862/files/sojutosixixegunojezul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/61297655714.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/44423914348.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/53348552231.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/pikefojobatuvo.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/
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/pikefojobat

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007da9.bin
b0ac640fbd2250090d03ae153e8977e50d4d0e718ac60bec16288d265b62aa34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 5108 bytes
font_01_sfnt_off00008f3b.bin
aa39d085013697aa7ffe999ba34cdb29a88bfb33783a3678dbf7f4c8e604ea6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3B 16204 bytes
font_02_sfnt_off0000c271.bin
f60772b6869086652a040dee328c3d1f18c5591217e92cd57bc35e79e491fd65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC271 16120 bytes

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