Malicious PDF — malware analysis report

Static analysis result for SHA-256 a141edc08952d0fe…

MALICIOUS

PDF

49.7 KB Created: 2020-08-15 06:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e6b425a9efe94ca525c1479c10f791d SHA-1: 1bbc568ee4ef13c50378086bb947c196f8335329 SHA-256: a141edc08952d0fe56d9c6c2487863ec95b58948afb435a935ccb35953e2714f
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute 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.com/wb?keyword=mattress%20firm%20adjustable%20base%20600%20manual
    • http://fexuze.scrapbookcreationsny.com/uploads/1/3/1/4/131453028/purefigokolirib.pdf
    • http://files.shawnmsullivan.com/uploads/1/3/2/6/132681674/remolaj.pdf
    • http://files.rwna.net/uploads/1/3/1/8/131857540/digiwixiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/11725506375.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/labil.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/tipaximojimitebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/21361319737.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/lopuwukajexugifutokopuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/fimugixefulomesifelureg.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/zatiximiseluzuforurumego.pdf
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/geometry_construction.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_off000081ae.bin
3911fac1da4e788051b6ddc54d6583620c31072304fc21848a10b715c87e62e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AE 5568 bytes
font_01_sfnt_off00009484.bin
1f1db9b4007f441d62cecec71ed580f0cf47fdeec742fb009b5d1d63683f646a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9484 10940 bytes

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