Malicious PDF — malware analysis report

Static analysis result for SHA-256 c381ba0add6a9de1…

MALICIOUS

PDF

41.6 KB Created: 2020-08-07 09:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f9c3e4850296c7573ee1f967769e89 SHA-1: d873e92cff4f6078658b1343ba8b5d8bb880fc86 SHA-256: c381ba0add6a9de12136db4beed20b60edeae0ea41d33abdec957cf086d2f16d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, and the PDF structure itself did not reveal further malicious intent beyond the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=linksys%20-%20ac1200%20dual-band%20wi-fi%20range%20extender%20manual
    • http://files.christophernewhook.studio/uploads/1/3/1/4/131483955/f93166c19d67.pdf
    • http://files.moruyaanglican.org/uploads/1/3/1/4/131408899/a982a8.pdf
    • http://files.cfcstuttgart.org/uploads/1/3/0/9/130969851/diweraxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/danegomidumuvupuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/pop_up_blocker_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/drake_to_much_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5131/files/capitalisme_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/24431255196.pdf
    • https://cdn.shopify.com/s/files/1/0438/4312/5405/files/intruders_tv_show.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/ccna_routing_and_switching_200_125_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/stages_of_strategic_management_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/74540435567.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/53866549059.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/68175468095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/pasowibipuvupifukene.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_off00006248.bin
e87be555e0f9b583f8811f1134b18029ae63355862bb5b4951915434d9760cd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 6108 bytes
font_01_sfnt_off0000772e.bin
2879b6c8331fef862241119dbcc91a83ef47f44f6d9101fe2ee227a9cbbb7e47
pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 9988 bytes