Malicious PDF — malware analysis report

Static analysis result for SHA-256 997db746a20b45f8…

MALICIOUS

PDF

42.5 KB Created: 2020-11-01 22:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a03a55258e3b17255dd59ab3efd2e6 SHA-1: 1b184da865a0f7d1d05d740eeee298e2b89519cc SHA-256: 997db746a20b45f811d53ea4375cc30456b308dc329ad64a22290e14c5d621aa
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure via the URL 'https://ttraff.com/123?keyword=giant+mole+guide+osrs'. The document body, though partially corrupted, contains references to this URL and appears to be a lure for a gaming guide. The presence of multiple PDF links suggests a link farm or SEO poisoning tactic.

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.com/123?keyword=giant+mole+guide+osrs
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5f9e595d7d5e0.pdf
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/cac2bf0d.pdf
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/pogirelelu-xelinag-vajuxeduteb.pdf
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2580885.pdf
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f912acea0ff6.pdf
    • https://xeseboda.weebly.com/uploads/1/3/4/3/134323550/labanukotezu-wanilixakifatun-tirew-bigokuxo.pdf
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f946d07a1b6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupuso/52706746950.pdf
    • https://cdn.shopify.com/s/files/1/0484/1016/5416/files/wojobalufevazemilatofi.pdf
    • https://s3.amazonaws.com/wizidimawag/wisibisekusiwaro.pdf
    • https://s3.amazonaws.com/wixanarer/amorgos_map.pdf
    • https://s3.amazonaws.com/lanubili/les_caries_dentaires.pdf
    • https://s3.amazonaws.com/felasorarabipis/faxafigavibubogupafa.pdf
    • https://s3.amazonaws.com/nerugiraxura/radikuguvujumuzoveli.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_off00006761.bin
0bc8a5a1e09c878677f475f80dd4f54164622308ce47d44b1659a0339b1d0044
pdf-font-stream PDF embedded font (sfnt) at offset 0x6761 5176 bytes
font_01_sfnt_off000078e4.bin
8c209dbee46ce72d35f75a605b716359f252d6c7645f1f281db037fd727d78c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 10668 bytes