Malicious PDF — malware analysis report

Static analysis result for SHA-256 91461f9779c05f11…

MALICIOUS

PDF

45.5 KB Created: 2020-08-16 23:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d5212cd4a1a55556e89e5b87385c56 SHA-1: 76338fcc50522e642bf2874d2b035add5e42e341 SHA-256: 91461f9779c05f1127ebbf990e6392164472e09f9962b30db9515497159fadae
128 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'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, some hosted on Shopify. The presence of 'SE_INVOICE_LURE' suggests a pretext for the malicious links. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=moto+one+vision+android+authority
    • http://files.subparmotorsports.com/uploads/1/3/0/8/130873822/7187352.pdf
    • http://files.petmeisters.com/uploads/1/3/2/6/132682070/xixikud-fapinilikem.pdf
    • http://files.brantinghambca.com/uploads/1/3/1/0/131070713/widuto.pdf
    • http://files.oceanhardwoodni.com/uploads/1/3/1/4/131437299/9cc6617782ef4.pdf
    • http://jarutiri.museumofsocialjustice.org/uploads/1/3/0/9/130969448/6901014.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/astrological_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/92739385574.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/rixudaxelufopizuxaxobo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/49374093951.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/wukegigazowebalotowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/affordable_housing_list_san_diego.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/29448481242.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/logo_branding_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/wuxomibukisoxifexabubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/27628900825.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9991/files/44458980646.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_off000072a3.bin
d9320661976693912815e7697f7b381bf7844589396743450ba0aba1b46622f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A3 5048 bytes
font_01_sfnt_off000083d7.bin
315b6afb54e5301388417fc6eafdf43b51fe4144eda910530ba9f716b655f5a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D7 10916 bytes