Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a59f9a232b508da…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 17:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a55c929828a59cc1831bb49b5854d9d5 SHA-1: cdade702c80f982382fb63b331a14ce87a7ec12f SHA-256: 8a59f9a232b508da443d75282c679cefd15329357cf2789cd3f1ab2b5d9417cd
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=uninstall+python+2.+7+mac'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=uninstall+python+2.+7+mac
    • http://files.icsocal.org/uploads/1/3/1/6/131637131/vejorosu-fozenapelu-gufofimegum-gowula.pdf
    • http://files.aztecbaja.com/uploads/1/3/0/8/130814246/0ca3062b.pdf
    • http://files.varshapremgames.com/uploads/1/3/1/4/131437246/bapegazidewuwa_dufafoj_sobatota.pdf
    • http://files.legendaryshadowstalkers.com/uploads/1/3/1/1/131163976/ffb0f94360b7bb9.pdf
    • http://files.healingrootshypnotherapy.com/uploads/1/3/0/9/130970004/4391324.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/96656866122.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/48589688326.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/89008086601.pdf
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/62655441471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/49941843720.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/61001074963.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/scriptures_on_business.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/99611574968.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/63738719159.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3415/files/72410988157.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_off00006c2d.bin
9ddbe83f167d4743cd72320d288d16078f68f64176a7f40fe15780be86833d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 5412 bytes
font_01_sfnt_off00007e8e.bin
b11b06c5c69f206c20c9036e6779fe579cad7f112f94c88678eb1b27ecd76656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 10192 bytes

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