Malicious PDF — malware analysis report

Static analysis result for SHA-256 6514362e8a8a0ec1…

MALICIOUS

PDF

99.0 KB Created: 2020-09-03 05:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 853b958f65621cc606a2e937dbb0d00a SHA-1: e984a0bfc89d874c5527c59afef296efa8c72ff1 SHA-256: 6514362e8a8a0ec162da947e45a4a36258596cf30f032ff819523834addb1382
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to trick users into visiting a malicious site under the guise of 'DKA guidelines'. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=dka+guidelines+ada
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de65f7_347f4f93d9784387b25c2f98b47df79d.pdf
    • https://static.usrfiles.com/ugd/cac9e4_441ae8dd4f2e4e3ea6cf178a911c678e.pdf
    • https://static.usrfiles.com/ugd/70a38d_f70bad014faa463e9c3396a9439109e8.pdf
    • https://static.usrfiles.com/ugd/1cfe37_da7f45f48c744ec0b2211ab84164b627.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/842174460.pdf
    • https://static.usrfiles.com/ugd/97368a_5fe4b970cdc04be7b0208118e2c6b19f.pdf
    • https://static.usrfiles.com/ugd/c8df25_bf12ea7c5bf546839fac57237a090aeb.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_dbc6a96fbb404999aca98cafd3c14869.pdf
    • https://static.usrfiles.com/ugd/89c6ad_8fb507fbb7874a35a060ddcb42d65db4.pdf
    • https://static.usrfiles.com/ugd/a43ec6_4ff4064a0987471983d53cf7c15a77f7.pdf
    • https://static.usrfiles.com/ugd/3dd68e_bb4d3df9c2f44343aed3a5f28a5687f4.pdf
    • https://static.usrfiles.com/ugd/de65f7_7bda8f59f569412681045197142bd2d3.pdf
    • https://static.usrfiles.com/ugd/a44510_7454f52359dc47c597dea33d28176160.pdf
    • https://static.usrfiles.com/ugd/8c0e65_7e0937fdf6fa4ccc89e15a0abfee8683.pdf
    • https://static.usrfiles.com/ugd/4dd980_9b245c796f9f4f9eb91057db7b80e229.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_off00013c2c.bin
e8c0752ba50b2a12e7bf36a0476ae23fb86a472cdedb248cddd23d169db0db1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2C 4960 bytes
font_01_sfnt_off00014d2c.bin
bc840475180f3ed3dbd51d53f616a5daa3eea756216550c37a2e8ecf0c2822a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2C 16300 bytes