Malicious PDF — malware analysis report

Static analysis result for SHA-256 6046466f0332fe43…

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 16:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f26a80d62a1017b127c12f2eede659 SHA-1: 33925d9c152d5b5d7513a3af30a06452ee5ac0e0 SHA-256: 6046466f0332fe43f59a3ad5d40bc5a9ffcab12c97f822d6ada17399b9794692
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for a 'driver daily log book excel template'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=driver+daily+log+book+excel+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
    • https://static.usrfiles.com/ugd/1f6d71_8fe089fa9c9147f2a495b9282367551c.pdf
    • https://static.usrfiles.com/ugd/b8c837_91e22bda275a4488aca5667fd10a698b.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b0291f9c78495bab1a7d9d37955ae1.pdf
    • https://static.usrfiles.com/ugd/7f929b_1056c805d6ec480583a4586b89050f73.pdf
    • https://static.usrfiles.com/ugd/4dd980_7519c513801349fdbc4c3c671f8ace02.pdf
    • https://static.usrfiles.com/ugd/3826db_2058e1ca283d4529a4f057b2d8bcd245.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/muroselobisavegazowapibiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/11116301718.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/duo_therm_57915_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/likuzififib.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/simplified_form_of_square_root_of_50.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006803.bin
1d4ee9604570adcf9bbb17185c8ec596f8d3b79147e8cff28300dce93b67916a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 5648 bytes
font_01_sfnt_off00007b3f.bin
46e9ec5ac3b5df933bda7f68cdef455530072ed400f10b03ad8809bdaf3e84fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 10192 bytes