Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd38174ea0341e4…

MALICIOUS

PDF

69.4 KB Created: 2020-12-16 22:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b4b61f64bfed5285d82c9722a59131 SHA-1: 241191a01f02c4b8021a4ed39f1463d79613c5e5 SHA-256: dfd38174ea0341e42f76596db6da43dd2c9773526f70aba7f8016a12cce84d8e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=life+is+strange+ps3+trophy+guide'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=life+is+strange+ps3+trophy+guide
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fac277fede8a.pdf
    • https://cdn-cms.f-static.net/uploads/4492272/normal_5fda3a893c1a9.pdf
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5fb2cf71495fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc98ad89bc93d20d9a597c2/1607043801174/33741284983.pdf
    • https://static1.squarespace.com/static/5fc1576327a199023ab86c6c/t/5fc2eb03e6d49a06bbf3a64f/1606609667826/ribbon_cutting_scissors_philippines.pdf
    • https://s3.amazonaws.com/petubapizo/architectural_drawing_sheet_numbering_standard.pdf
    • https://s3.amazonaws.com/mejobu/zodizi.pdf
    • https://static1.squarespace.com/static/5fc0dc49affbf90a66ea44d1/t/5fc619fd7acac6192a92c743/1606818303112/28341372216.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/94089681423.pdf
    • https://static1.squarespace.com/static/5fc5180827a199023ad07c53/t/5fcb8b8ca3bc3d191530498d/1607175052323/sprinter_gear_stick.pdf
    • https://static1.squarespace.com/static/5fc339c8df132613bbccc541/t/5fc7f05489c46b43240a10c6/1606938709696/87895703553.pdf
    • https://s3.amazonaws.com/kudufigunabi/pajefazufetobi.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_off0000d141.bin
dc96fb892aa7fe0215f0415f09d0ce8e9b4faba4d3d95a85289e5f0338ac48e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 5480 bytes
font_01_sfnt_off0000e3ee.bin
8777bbcdf264b36c3ec2eed4443ca210b446fa40ce8b1c64a841da0d26eb7343
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 10324 bytes