Malicious PDF — malware analysis report

Static analysis result for SHA-256 022d6c7199d2c2d3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 23:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4512c316a1e091878f3d174c35175bd2 SHA-1: b0384604aeccb82c9995cc16c3556b29598aacc8 SHA-256: 022d6c7199d2c2d3fd6b1c107d30fb464c1dcd097c7d24a1647181b45b5056cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, suggesting a social engineering lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=general+knowledge+quiz+questions+and+answers+nepal
    • http://legojofas.sacredstarastrology.com/uploads/1/3/0/7/130740257/bogewise-xutapexa-bipitofokivu-najuvibadom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/40125570846.pdf
    • https://cdn.shopify.com/s/files/1/0439/5981/2254/files/asian_handicap_explained.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/79295744288.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/17724107752.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/jozobemobupategaloxeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/tafokiwizaxiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/kazusevofuxafirarilaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/58938702985.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/43847478795.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/25489499584.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/gebavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3356/7125/files/judiroluzigowo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004803.bin
f518b1c9c68169eb6df1506740e228d60f30194247068aa1d76d015ab29c6b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4803 5372 bytes
font_01_sfnt_off00005a71.bin
0825a2aba278485c7f3ba1be9ab6916658b9ce6f0fe1965150085cfc46807040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 9856 bytes
font_02_sfnt_off00007bda.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDA 4324 bytes
font_03_sfnt_off000089dc.bin
08f9b091e3a0a97940f28bcfe8e46798381de32e27fe0155ac5865d919a4b561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DC 3108 bytes

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