Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6da9050e03ee37…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 05:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84a88d9cdbff135602757c99160819ac SHA-1: c5f4137d460db8d8b80754620c3c9d6a4c88d0d7 SHA-256: 8d6da9050e03ee37565f29d125c2d128e67941adf8096b6b68283f4a8fea950d
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical finding of a malicious redirector link, directing to ttraff.ru. Additionally, it features a link farm hosted on cdn.shopify.com, with many links pointing to external PDFs. The presence of a visual download button and instructions for a password-protected archive suggest a lure to download further malicious content or engage in credential harvesting. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=combine%20two%20pdfs%20without%20acrobat
    • http://files.alfurqaantours.com/uploads/1/3/1/4/131438468/856052.pdf
    • http://files.juniorbisonhockeyclub.com/uploads/1/3/1/4/131453733/2169697.pdf
    • http://gegop.trfike.com/uploads/1/3/0/7/130739140/4c8d2cb.pdf
    • http://tinojevup.johanneimmis.com/uploads/1/3/2/6/132682663/bovomadurokejesi.pdf
    • http://xuruder.fullnessinchrist.net/uploads/1/3/0/7/130776485/7449307.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/bww_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/60340288259.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/livre_apprendre_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/damaziguvalawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/is_11513_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/robosojok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7442/0890/files/kung_fu_grasshopper_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/97252991339.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/possessivpronomen_deutsch_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/96025331189.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/39030418877.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/87218189534.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_off00006e9f.bin
468adaee52753da434435cf9b724a113b088cc79e2e9310e0936c9cf23e837de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5500 bytes
font_01_sfnt_off00008139.bin
ae53e092b227d24f221640712c7eb934cdba1ef0cf34dcf849e967b0f097b3a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8139 10608 bytes