Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c954d904d3ed6e2…

MALICIOUS

PDF

38.6 KB Created: 2020-09-01 18:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28bf260f0aa5557b989fa04bef6b67b5 SHA-1: 677e253e768cb5392b7dbca814e0716a8c832906 SHA-256: 6c954d904d3ed6e2b94bed2b5b69bf25134bbf7078ce3aaeae6142488d8a826c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/pify?keyword=bewars+audio+songs++free'. It also contains a heuristic for a PDF link farm, with numerous external PDF links. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF URL, suggesting a social engineering lure to drive traffic to malicious sites.

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/pify?keyword=bewars+audio+songs++free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5ef510d21cea40feb2e98415b686354f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7bcc7ed12d6f4e20a27e744070c3c711.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/136d07_80802f65c4974dc58953cc1c29e571e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/735424_b23b60c17f0348a8a7607940b023890d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cbd68313aa79451b801647f1eb970551.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3bf302_eb6321ffa2e54720a5da317cc986f4bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f1c3366a4d0b44228f80c18f67190123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/bosuzanutoboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/apposer_une_signature.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fb535a3769be4c5fbdc1600a9f909bca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/79e0dc_61fb05d4b31941aea9e111259be748ce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e9e83_e98de87a9dca4b9da6f3411ba16216ca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0adedf_0529ebcd48a140c5b22595e75e7b62fe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A1 5184 bytes
SHA-256: a8669bf5adba38b7d9d5f5d9ff15b55b55b7dca45c8b9a0fdfde25d3fab131df
font_01_sfnt_off00006365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 13276 bytes
SHA-256: 79a91481d5f526476009fdbfee0547cfe15eab9fcb56e122e2c1e653fe3d2fa4

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