Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d558442c95b28c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 20:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726f6a3ba1395f03249f03816fb90e58 SHA-1: bc16ada84da24203a311a1cb6a994a8b558b9ed4 SHA-256: b6d558442c95b28cded0f30d7513003d99c12b91b0e32a525874db54597b0f20
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to disguise the malicious intent behind a seemingly normal document.

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.com/pify?keyword=comparative+adjectives+list+pdf
    • http://files.misshavishamscuriosities.com/uploads/1/3/1/4/131453018/6f301fafb1a17.pdf
    • http://files.tryoungcrew144.com/uploads/1/3/1/0/131071258/8845025.pdf
    • http://files.byronsgames.com/uploads/1/3/1/4/131454012/sozixeleb-zexor-zikenojojefo.pdf
    • http://files.colorstonesatl.com/uploads/1/3/1/6/131636834/pulaloj.pdf
    • http://files.learninggenerously.com/uploads/1/3/2/7/132740480/fenadeji-palonapomeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/85793904695.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/63272648011.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/retirement_planning_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/75758165917.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/88709885737.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/91949892209.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/6th_grade_math_review_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/9543/3117/files/puguwan.pdf
    • https://cdn.shopify.com/s/files/1/0444/4350/0710/files/aircraft_structure_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/muwumetemigon.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/vuwijupino.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/85379443907.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_off00006513.bin
b01e29d40a5bef61d90a9d9c4d3ac9c3da9931b1db0fa498722af307b7afd3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6513 5344 bytes
font_01_sfnt_off0000772f.bin
0724ded1147ee46fc8f60ea3f69a428df0e70787eb313c604449bb39a0a4d015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 10516 bytes

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