Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb920c1468c899e…

MALICIOUS

PDF

140.7 KB Created: 2020-08-06 14:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad02e1fce53a7ad503a32ea3424d3214 SHA-1: c2b79dd9c34eaa5117c40ceccdf8cd969338e7eb SHA-256: 3fb920c1468c899eee6ec35052bee5c510483b5b3bae3a51bdd935c824a257e2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into visiting a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

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=chemotherapy+definition+pdf
    • http://files.maasaifit.com/uploads/1/3/1/4/131455475/7e27eb02.pdf
    • http://files.unityphilly.org/uploads/1/3/1/0/131071114/puseferekev.pdf
    • http://files.dbblue.com/uploads/1/3/0/7/130776499/68c11f6bc5.pdf
    • http://files.lutzka.com/uploads/1/3/1/0/131069781/bidit-xemojegatopufir-defifexe.pdf
    • http://files.neverquitneverdie.org/uploads/1/3/1/1/131163838/fodezutiwusidukow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/73026952706.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/porefute.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/73409099866.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/jopade.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/14316982622.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/ford_explorer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/18905389831.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/wubovoxuzadukebivokol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/82170864158.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/57695695678.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/2480898912.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/fuzodikiloni.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/zegijagizijuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/wolifomomudawaw.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_off0001eea1.bin
b56fba39296087b0832804cd8513d0b620f4997fc4fad7c604f6f4ea560849c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEA1 5076 bytes
font_01_sfnt_off0001ffc0.bin
6599296c5b405749045b2a13fc4d73946ab98eed4340b370931715ac4e6a81cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFC0 10760 bytes