Malicious PDF — malware analysis report

Static analysis result for SHA-256 344900f08f1daa67…

MALICIOUS

PDF

35.8 KB Created: 2020-09-17 07:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d57e065af8698ecc855a247edabab12 SHA-1: 1076001ea2d14b1fd4c71d707d38781744e999a3 SHA-256: 344900f08f1daa676f7db03360abb484125b65890d8eeb0843712956d3839d27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, identified as a link farm, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that matches the malicious redirector. This suggests the primary purpose is to drive users to malicious sites.

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/wix?keyword=drift+hunters+hacked+unlimited+money
    • http://files.biamontestables.com/uploads/1/3/2/8/132814977/930bd444195b23.pdf
    • http://nogejaza.dogoodmediamix.com/uploads/1/3/2/7/132741593/ef12c.pdf
    • http://files.casapinessuperherorun.com/uploads/1/3/1/4/131438018/xuvefijoriwo.pdf
    • http://vovawapi.soundshilohshepherds.com/uploads/1/3/0/8/130873947/fadolini.pdf
    • http://files.pome.ca/uploads/1/3/1/4/131408280/1a4fd8a.pdf
    • http://luxej.teamwinfrey.org/uploads/1/3/0/7/130739298/8604758.pdf
    • http://files.mostlymaille.com/uploads/1/3/2/6/132695867/pazidugifatutezexu.pdf
    • https://http://www.crazygames.com/game/drift-hunters
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.pdf
    • https://cdn.shopify.com/s/files/1/0428/5703/7990/files/asme_journal_of_mechanical_design.pdf
    • https://cdn.shopify.com/s/files/1/0480/6367/6580/files/wovibobutejejesuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7818/files/advanced_computational_mathematics_notes.pdf
    • https://4cf70981-55fc-46a0-aaf8-8d1d45da1779.filesusr.com/ugd/1e8759_ab7721e5e0e94d5ba35cc2bdf143cc56.pdf?index=true
    • https://6e6672c4-0f08-4f38-9a55-2f2ee55ea06a.filesusr.com/ugd/008e52_37f7f9065b434a9ba488e6d17cb5c142.pdf?index=true
    • https://c778279a-e9d0-45bd-a7ef-1026564a1820.filesusr.com/ugd/b18e4d_c8b895337d5545349af01498cafc96f9.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cd5.bin
58f509350b8aedf3aaa71302eb731051a193194bfb9b779b023f4c9dc5ae39fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD5 5424 bytes
font_01_sfnt_off00005f2b.bin
b1f7a948abde34a3aa7d0c00cbeb82825982b09ddcbf600f25f1fd3747baccb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2B 10284 bytes