Malicious PDF — malware analysis report

Static analysis result for SHA-256 641d3d9ec777ab20…

MALICIOUS

PDF

46.8 KB Created: 2020-09-11 02:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52f68a2e814db63e0aad92a7b5ab4dc5 SHA-1: 6cf7e2551e6d40c1b777ede668ae4574c50f6f3b SHA-256: 641d3d9ec777ab200ce968b5b8b86c89d6703f0a8f8aa89ca0a9b713f29a186c
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting urgency and a form, likely intended to trick the user into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/wix?keyword=f.+n.+a.+c+test+full+form
    • http://files.tyraburton.com/uploads/1/3/1/3/131382141/xatubavedega_kunefevinu_lowubifinitize_muwawagir.pdf
    • http://files.edinburghlocalmod.com/uploads/1/3/1/1/131164534/gilolexudasazofipogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/067ecb_3658492571f14a1db69374a5ab3d5b1e.pdf
    • https://static.usrfiles.com/ugd/17159d_f781f77f560c4b94ba35cb3c94a7098a.pdf
    • https://static.usrfiles.com/ugd/d94ae5_14b7f34cb77f4e839fb1ec4acf2e7f0b.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/bass_guitar_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/barmeno_bold_free_font.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/mikenazumuxorefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/26570881230.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/72763381347.pdf
    • https://static.usrfiles.com/ugd/74e9cf_9b20926a93d0439f9bedb406948c07f0.pdf
    • https://static.usrfiles.com/ugd/0c41e7_c0e18f4b67504e918223452ca834c9fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b7f69f54454e3f9f877e93227c4a94.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6162e7ae99f4d2786f0eabd5d9605a5.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_off000079d8.bin
2212e41ce9e2fda05d1cb7dc8af75150aaef0696c357d181ca06b799ddb2c3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D8 5016 bytes
font_01_sfnt_off00008ad8.bin
3609e74d3d9767c9a6802bca6e08bbb814489a320e44eba87d6c42c3fac4d87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD8 10604 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.