Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab0dc31d8b4d28a…

MALICIOUS

PDF

45.8 KB Created: 2020-08-04 09:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a68d83ce876df3314e3b37371fb06fab SHA-1: daf93434271f74c3732031b134b533421c2b10cc SHA-256: 2ab0dc31d8b4d28a02973357f397afffad60b201d663b6dc90bef6c055a0037d
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=simple+balance+sheet+example+pdf', redirects to malicious infrastructure. The ML classifier also strongly indicated maliciousness. 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=simple+balance+sheet+example+pdf
    • http://files.wowpartyinvites.com/uploads/1/3/0/9/130969505/2051958.pdf
    • http://files.rockymtlaceguild.org/uploads/1/3/1/4/131438127/9829069.pdf
    • http://files.codyturkeycalls.com/uploads/1/3/2/6/132682976/radizuridobel-ruveno-lojerepijorim-morexorekaxuja.pdf
    • http://files.caseybradleyarts.com/uploads/1/3/0/7/130739076/negusej-tetir-fimebijeg-gedefasokip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8124/4577/files/1000_ways_to_die_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/nejekizenarunigevotek.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/38884848647.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3789/files/boston_legal_season_1_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/66599262877.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/gijajolefegad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/5355025964.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/2818127963.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/cp_snow_two_cultures.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/28293772066.pdf
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/xiriwalegibebuvore.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/takudetegibirisora.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_off0000735b.bin
51c60ad2bb431acd48c0e2ab354f55c4c35e0d2f7dafb737ffcce518f5909ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 5608 bytes
font_01_sfnt_off00008648.bin
41e38a77ed4d0fc0f097f1634f297ef5d715f18c9e8cae20a51b226511436540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 10640 bytes

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