Malicious PDF — malware analysis report

Static analysis result for SHA-256 3659a78f79233e75…

MALICIOUS

PDF

36.3 KB Created: 2020-08-29 01:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9faea46509f5d20237284237c67ed56 SHA-1: eed01d96956284134d4f77c9a9b7e91ede4abd59 SHA-256: 3659a78f79233e75a7ffe57fc30eb456deb29fd2b72f8cb63a3242622cf61a5c
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=Dr.+michael+tanner+marwayne+alberta'. Another heuristic indicated a large PDF link farm, with many links pointing to shopify and static.usrfiles.com domains. The document body contains garbled text but includes the same redirector URL, suggesting an attempt to lure users to malicious content.

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.cc/wix?keyword=Dr.+michael+tanner+marwayne+alberta
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/3544304740.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/11967925895.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/27971976563.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/bibawokafuxeduvotofoxanu.pdf
    • https://cdn.shopify.com/s/files/1/0465/5372/7126/files/35804072007.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3c80b63c2ef4ff095a3c9af6a0180b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_66def0301fec4b8982a9bcd60fb46537.pdf
    • https://static.usrfiles.com/ugd/b8c837_17f3278c38ea432f9b2b6b4c24efe6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e5dbee264b4189aa6fe418169d5cbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafe7d4a9c8c49fa97a38022815f22f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_38708ea07c0845c2a202dda7ae14a2e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b7f69f54454e3f9f877e93227c4a94.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004466.bin
796d0efeb432b363700e7fb127f6498b03f2421b3de4e5a2dfe0f6768befb34e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4466 4904 bytes
font_01_sfnt_off000054fd.bin
7fc60787b9ad93471bc29dd239391a174236659c96fa0565d8710539b6e087c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x54FD 9780 bytes
font_02_sfnt_off00007685.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 4324 bytes