Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3831930dc5d123…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 09:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b4409986fecd2f590eaf1ac420a09af SHA-1: c37fa906beda72b4a2840ec821945c94f6823314 SHA-256: 6d3831930dc5d1235311970038652cd8a7dd3b9895055f15fe15606066950046
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL and references a vocabulary PDF, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential 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.cc/pify?keyword=30+days+to+improve+your+vocabulary+pdf
    • http://files.traduccionescreativas.com/uploads/1/3/1/4/131453712/gozojakar.pdf
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdf
    • http://xotura.teakslockservice.com/uploads/1/3/2/7/132740435/wezinemaniwume.pdf
    • http://dopesu.jamespatrickcronin.com/uploads/1/3/0/8/130814229/wawibodigenidipetoze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/68156827652.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/2763774490.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/82330570728.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/tudakibedubux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/7743984453.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/97182769569.pdf
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/basic_computer_course_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarexomerowomowubufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/julaxomome.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/66951475418.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/tiwefusonibenexesuvaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/80469770294.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/pejaxoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/71342476179.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_off00006af5.bin
355e13f28b420ce3a5e0118dedb86de36c022407aa46508a2f1f89ed825bd2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5812 bytes
font_01_sfnt_off00007eac.bin
ed600d2171914894179a5a6f7ac0e6634a1d8b95a3093c38825ff83cec908708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 10276 bytes

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