Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd61b7170be791e…

MALICIOUS

PDF

33.7 KB Created: 2020-08-18 23:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b8663c097eb179372f7a1823125cc4 SHA-1: 43f185ed5b7f84495dd389c91967763ebb6d3aa9 SHA-256: 2fd61b7170be791e513ac8e19b6bed9d823c7a7037837a741f887f435309d17f
120 Risk Score

Malware Insights

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

The PDF document contains numerous links, masquerading as a Hilti firestopping guide, that redirect to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=hilti+firestopping+guide. The document also hosts a large number of links to PDFs on Shopify domains, likely as part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=hilti+firestopping+guide
    • http://files.summerfoxart.com/uploads/1/3/1/4/131410479/tixavufop_tiwopagofoj_zemiz.pdf
    • http://files.themissingbride.com/uploads/1/3/1/8/131859895/78db34.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/28899417639.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/luvudumem.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/attending_physician_statement_form_york_university.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/jabariya_jodi_full_movie_mp4moviez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0450/1922/files/72900740194.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/zubuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/77762205735.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/77262397546.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/egyptian_cotton_bed_sheets_ebay.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/2380248037.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.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_off00004a57.bin
ee6cc1f834e7e7eba1bf00c97bffebf5d294cc82df4baff46b30e2c00b89034a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A57 4960 bytes
font_01_sfnt_off00005b41.bin
2b9dee6408bbceebd25419f9e706eecd2350118067aac46df2616dff56d813c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 9080 bytes

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