Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac333e99669333b…

MALICIOUS

PDF

42.2 KB Created: 2020-07-28 14:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b6fe7ab117ae8fc1a3ae2aab0cd352 SHA-1: 3d48d39d3657aaeed83dd6eee7e4db17fe68bad8 SHA-256: dac333e99669333b84e365efd285633ac87b59376d7757ab6d454ec18eab4aaf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. Another heuristic flags a link to a known malicious redirector. The document body is heavily obfuscated and appears to contain junk data, suggesting its primary purpose is not to convey information but to host these links.

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=free+printable+clarinet+sheet+music+disney
    • http://files.thepixelempire.net/uploads/1/3/1/3/131398231/firomuvanew_futepivo.pdf
    • http://files.boogiesandbarrels.com/uploads/1/3/1/3/131379085/rujipomorupon-noxegut.pdf
    • http://files.statenislandsolarcar.com/uploads/1/3/1/3/131398332/43ea042360d.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/82968275358.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/tozizixebelupidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/27373276923.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/26105121094.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/5792246279.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/ponozifujapurekas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/57610630611.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/susibufomatafiroregij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/67563338455.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683c.bin
01e0784f98c589ea4aefe9a9a2c6735fa2f74ba28d8add0cb73e49f915073869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683C 5280 bytes
font_01_sfnt_off000079f0.bin
9f6b207417722d2b957039d0f92e24bb6d112b04b9d7f02844be0da9db899202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 9936 bytes

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