Malicious PDF — malware analysis report

Static analysis result for SHA-256 5560b7a53fdb8c49…

MALICIOUS

PDF

98.4 KB Created: 2020-11-07 17:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f0ae1c18244047fb61f1f2b1543068 SHA-1: 7684e893909a7dbc62ebb5ff410725b635956e6f SHA-256: 5560b7a53fdb8c4921426b103d2fc0cfb339fe93c0ff27d203daeb6ef101266c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to lead users to malicious infrastructure, potentially for phishing or malware distribution.

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://gettraff.ru/123?keyword=amelia+fieldmouse+fanon+actress
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/8211b511.pdf
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f96f1051db51.pdf
    • https://cdn-cms.f-static.net/uploads/4449402/normal_5f9ef3fa7b8ae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wepeliniru/way2sms_sign_in.pdf
    • https://uploads.strikinglycdn.com/files/67c59c9d-9f9b-4eed-a6fb-53d022b058c0/memujasegikazefimur.pdf
    • https://uploads.strikinglycdn.com/files/ce18d148-efe0-43e7-841f-03f309a60ad2/bufudedejarevo.pdf
    • https://uploads.strikinglycdn.com/files/12fe0d6c-93cf-47f6-85b9-13d7da00dd94/ravetoxivuwoketefiliv.pdf
    • https://vejupegu.files.wordpress.com/2020/11/97122287595.pdf
    • https://zekalewuwodo.files.wordpress.com/2020/11/61190207107.pdf
    • https://uploads.strikinglycdn.com/files/e2456cdc-d01e-4f1e-8f1c-b5391841ef58/jams_shorts_images.pdf
    • https://uploads.strikinglycdn.com/files/aade0127-a9d9-452d-9cdd-279644e52af3/lutixuxejigudusi.pdf
    • https://uploads.strikinglycdn.com/files/ccfcb1bd-ce18-4597-badc-5488d743ff40/dragon_bone_weapons_skyrim.pdf
    • https://s3.amazonaws.com/wunupalezozerud/zumufijoxizini.pdf
    • https://uploads.strikinglycdn.com/files/e8b6daa3-4370-4731-9408-f556d5416f6c/vikanipun.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_off0001447a.bin
cd7bc66b24444705c2c9508941f066ec48cd3c405b103dda94ac36e76ca40fa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1447A 5156 bytes
font_01_sfnt_off000155f0.bin
6e36a0c42c136f88bf1b7514aae05face9f88130409ca2f5b3ebff6ce17f80b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155F0 11504 bytes