Malicious PDF — malware analysis report

Static analysis result for SHA-256 981940ec6a6f7d04…

MALICIOUS

PDF

48.4 KB Created: 2020-09-17 13:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f16f8e6cb9b15721dc7f6b7e9dd98d SHA-1: 95c05245f4bedef7143dc1b0e0f44fcc67d40b8d SHA-256: 981940ec6a6f7d043eccc6f68f0a972b2763788324b68591c6d701fdd5566904
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a deceptive document body and numerous embedded links, including a critical redirector link to 'ttraff.link'. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a network of links, likely for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.link/wix?keyword=geekvape+aegis+x+user+manual+pdf
    • http://konoxa.courtneysuzannelee.com/uploads/1/3/0/9/130969336/ab7d437887.pdf
    • http://nujunimaw.garygintherstudios.com/uploads/1/3/0/7/130738714/bevubagu-vexatu-zelatefefoj.pdf
    • http://falasi.oundlehockeyclub.com/uploads/1/3/2/7/132712323/vawuxunolixera.pdf
    • http://files.createlemonade.ca/uploads/1/3/1/3/131398250/ad9b35.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/54035953755.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/nusuluzozuloxidobol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/fojumovorukoxapud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/fomunitojifuxeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/mkv_to_mp4_mac.pdf
    • https://74c12e77-3511-4de8-aff1-ea38d765ffd0.filesusr.com/ugd/bd1fc0_30bd7b2f7e714292a19cbf7a8afa7fb4.pdf?index=true
    • https://dacf5b93-7dc7-409d-8997-6a163b0dd00e.filesusr.com/ugd/f459ea_7c0da2fcb5b24849a39864ece9907a51.pdf?index=true
    • https://bf1db2ca-2fdf-4dfa-9b42-03dcd12af893.filesusr.com/ugd/565485_3c9c8dbd95c14d8c8ddef9e6caf5c456.pdf?index=true
    • 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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007028.bin
63f5c0142b066ccf3189918fb96684012aeb8c6fffb07232038802b36691ce69
pdf-font-stream PDF embedded font (sfnt) at offset 0x7028 5276 bytes
font_01_sfnt_off0000820b.bin
603308feae65a63bdfd8a7b89cae43a3fc11bb0313bc5d7a0648d24d97b79753
pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 10708 bytes
font_02_sfnt_off0000a652.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA652 4324 bytes