Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88429b04504db93…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 03:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39644bf53efa0c05607817b8172c0718 SHA-1: e0a3095ed85831a8a09f28566b0e9eae37938469 SHA-256: b88429b04504db93ae72a3887ec88f8595ef44e3b17d525f17b5dd5a326aa22e
152 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is a lure for a manual, likely to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify and static.usrfiles.com, indicates a link farm strategy to obscure the ultimate destination. No scripts were extracted from this sample.

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/wix?keyword=miller+maxstar+150+stl+owners+manual
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/33349354592.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/3120760891.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/borug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7086/5052/files/public_speaking_topics.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4687/files/remote_control_john_deer.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba489bf9134d4ab685139343aed42a73.pdf
    • https://static.usrfiles.com/ugd/b8c837_02be4e9ddc814943ae020a14cdcfa3df.pdf
    • https://static.usrfiles.com/ugd/b8c837_02d3e4587d254423a7fbd95ea432ab12.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e7ce6df96048598ab3c47108988558.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d8f19c115ae440c85890e15b3f8a894.pdf
    • https://static.usrfiles.com/ugd/b8c837_10c165ccca2648dea3ce9a573b0be4fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da5ebc1360471ab55a8ca19d7e0308.pdf
    • https://static.usrfiles.com/ugd/b8c837_de9313b406d64784937543534630954f.pdf
    • https://static.usrfiles.com/ugd/b8c837_95b63f57fc54495db8ce1454c6586e8f.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_off00004a37.bin
df4994fcd85165ffd898528d241fde597657f71d74777e3178ddd094fe533198
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A37 5316 bytes
font_01_sfnt_off00005c53.bin
05ce755fec49270d5d3baf0e9a50e1e88e7005b009ce6d3dbc8cef11ffb53e96
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C53 13752 bytes