Malicious PDF — malware analysis report

Static analysis result for SHA-256 588e85f09fa791ac…

MALICIOUS

PDF

45.5 KB Created: 2020-11-05 15:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4fd544d3897529fe0692fc666dcbb2c SHA-1: 1a665fe38897f32fe30ff06b341d75d13365f476 SHA-256: 588e85f09fa791acb67070c896bc199696c1e06c7ad656082c26ed430c4149a5
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a link farm hosted on weebly.com, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The primary malicious URL identified is traffnew.ru, which is presented as an update for "Snap on solus ultra update 18". The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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=snap+on+solus+ultra+update+18
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/a4e74bd976b8f9.pdf
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f889ad731b29.pdf
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/zuronuvef_bazakulanigipe_bofufuvup_xininideweruve.pdf
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/zufimudugagab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/henghuili-files/88918393927.pdf
    • https://s3.amazonaws.com/napisakaluja/goblin_boss_5e_dd_beyond.pdf
    • https://s3.amazonaws.com/fajeloninesitel/19435118370.pdf
    • https://s3.amazonaws.com/lunojol/study_guide_for_ascp_certification.pdf
    • https://s3.amazonaws.com/jasadavebaga/bananijoxisegavagaromiv.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/flightradar24_pro_app_android.pdf
    • https://uploads.strikinglycdn.com/files/bbe88a08-89c0-4069-8daf-20276c87b9c9/gelulenibiguj.pdf
    • https://s3.amazonaws.com/gupuso/cbse_6th_class_maths_worksheets.pdf
    • https://s3.amazonaws.com/fomaralunex/minecraft_free_download_unblocked_apk.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_off000063ad.bin
6041107e2844bf654a5a799e40a2af501855fe0b9373a4efc0e34ea252ad1f1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x63AD 5136 bytes
font_01_sfnt_off00007524.bin
a7e6e4a2205436d007f1e3bb8995ab8f9dc4a8eac9bade9a4f05d7722fa0027e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 11192 bytes
font_02_sfnt_off00009b3b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 4324 bytes