Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fc7f03c493486e…

MALICIOUS

PDF

59.6 KB Created: 2020-07-30 13:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdd1325f93d44e1899c5582e570bc66f SHA-1: a0c84a8dd285a071f10391a3874234347dcb5fd2 SHA-256: 09fc7f03c493486eca17b98a92ad8f6d6c10e1e2503800580dd200bb9c6c92bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'automata theory solutions pdf', likely a lure to attract victims searching for academic content. No scripts were extracted, but the presence of malicious links and the link farm structure strongly suggest an attempt to redirect users to harmful sites.

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=automata+theory+solutions+pdf
    • http://files.rotaryseymour.org/uploads/1/3/1/8/131872079/suwet.pdf
    • http://files.australianboxingmemorabilia.com/uploads/1/3/1/4/131406658/galubimuw-bexezazegir.pdf
    • http://files.cjhsmediacenter.com/uploads/1/3/1/3/131382239/sisemat.pdf
    • http://files.akyeraalexiphotography.com/uploads/1/3/2/3/132302924/dowukuforadino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/26372720076.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/mogajarakadodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/75516513105.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/kizuxedubiwazuzawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/kirusebemapavakabavupam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/zilakaseva.pdf
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/7191462517.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/kirapisotorumomokekuram.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/kugaziwuvitejukafitimowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/dimefawivenolofukagep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/16929889545.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/16268199145.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/kimopolonifotomo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a16c.bin
a4f32c84c0a75248a899816a8fc24a98fcee8e5a4e0dc495b1f522e8bc0cdaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA16C 5252 bytes
font_01_sfnt_off0000b323.bin
fe607fa10fb8f055d94a53c62133839ff5242d49432184450a929466e0cdf119		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB323 14628 bytes

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