Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe688c21efadaaa…

MALICIOUS

PDF

48.1 KB Created: 2020-11-09 15:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6ec42981aa17b4c57ddccb3478e66ae SHA-1: db2c6fd5e4ba978aef247a1b4dfea3ce78eaf8e6 SHA-256: bbe688c21efadaaab66ff7c0afff75f04ca6a423cde05dffd33620616f40638e
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to a link farm designed to host other PDFs. One prominent URL, 'https://traffnew.ru/aws?keyword=allen+and+roth+10x12+gazebo+parts', appears to be a lure, potentially redirecting users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests an attempt to distribute or redirect to further malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/aws?keyword=allen+and+roth+10x12+gazebo+parts
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/9124817.pdf
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f8f962a99ac1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/suxugipipolazog/santa_claus_and_his_old_lady.pdf
    • https://uploads.strikinglycdn.com/files/52260a9d-9e4c-44db-8832-c2b4672c5c86/76102597619.pdf
    • https://s3.amazonaws.com/jidosatikim/us_map_with_cities_and_highways.pdf
    • https://s3.amazonaws.com/lewuli/69104029622.pdf
    • https://s3.amazonaws.com/henghuili-files/nios_deled_course_510_assignment_answer_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/21e7dff8-8c60-4a1e-b7c0-72b233392114/free_fnaf_games.pdf
    • https://s3.amazonaws.com/mazugezijap/busesasubonamuvafiraze.pdf
    • https://s3.amazonaws.com/litunux/absurd_person_singular_script.pdf
    • https://s3.amazonaws.com/pazifetanegapu/89241218684.pdf
    • https://s3.amazonaws.com/lorifawuvawot/envision_algebra_1_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e90.bin
63da86b88456e42100152e947e65e036e56bf8055bb55c899116875671528c53
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5532 bytes
font_01_sfnt_off00008158.bin
b5f865bee5c618af024a3456b77d2be11d69c966262c2f2083707bda213a53ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8158 10580 bytes
font_02_sfnt_off0000a579.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA579 4324 bytes