Malicious PDF — malware analysis report

Static analysis result for SHA-256 e761a9430e544ccb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 21:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 593384abaa3770aed7ad7a5e619471cb SHA-1: 2a2d748d0f613b03829e00660ef59d4b783666bd SHA-256: e761a9430e544ccb021067443f938e3345ef061018da55e694f325238b748353
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a "structured cabling pdf". The document also contains a large number of links to other PDFs hosted on Shopify, likely part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document and redirection to malicious infrastructure.

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.ru/pify?keyword=structured+cabling+pdf
    • http://files.autismastronaut.com/uploads/1/3/1/4/131482886/mimosologimumeve.pdf
    • http://files.shoppalomaclothing.com/uploads/1/3/1/4/131453560/7488cfe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/91228774802.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/34337282598.pdf
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/rixibusadimizunojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4220/files/bhagwat_geeta_gita_press_gorakhpur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/augustus_caesar_biography.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/penabebifibiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/math_problem_solving_steps.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/95711987307.pdf
    • https://cdn.shopify.com/s/files/1/0439/0964/4456/files/annotate_windows_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/vafimow.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/54159227090.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/88096987360.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_off00005fe7.bin
f6f5f5ea5f425296500800e192a2f73d441cdab53062a9eabca21a52de885f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE7 5388 bytes
font_01_sfnt_off0000723f.bin
0c354f3f7f757af909a42c01ffef51d2542677833f3cffc48444b83f17c86458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 9872 bytes

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