Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af527070f36894c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-05 15:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5698050d77da0f339904b18ad5f6e8a SHA-1: f4c4d6e939f0f03381e30f7aa952f30fd75c422b SHA-256: 5af527070f36894cb9f74ab2a037d336f5fcd08f1c4cd8f8282e14d233ac7712
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=adding+mixed+numbers+with+like+denominators+word+problems+pdf', is a primary indicator of this malicious redirection attempt. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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.com/pify?keyword=adding+mixed+numbers+with+like+denominators+word+problems+pdf
    • http://files.christimmerman.com/uploads/1/3/1/3/131398250/8665906.pdf
    • http://files.everylifelives.com/uploads/1/3/1/3/131398088/xaveleset.pdf
    • http://files.stlandrycatholicchurch.com/uploads/1/3/0/9/130969673/lopokapudez.pdf
    • http://files.jeffgoldsteinattuner.com/uploads/1/3/1/3/131398279/f9bbcf2eca63b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/kojovizozez.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/dakitexiluwemojasivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6628/4446/files/roluketalajimarumiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/51809587997.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/vizuzimujarowibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/tekazenepibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/24209814315.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/witebideve.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/banquet_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/15645088853.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/66489853220.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/61874944522.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_off00006365.bin
9698bed1102336aeb19a8216d169696b2808feed44cb34cf528ca9846432ecf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 5808 bytes
font_01_sfnt_off00007711.bin
2b21aab054f5a4cda6b1ded60cb684e094ebaa1617091d87c9b78aaf15cd53db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 10088 bytes

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