Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d579e991fe4fe39…

MALICIOUS

PDF

45.0 KB Created: 2020-11-04 22:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 83ea43b03d9f9ae1c5fd31f5c5177964 SHA-1: 5fd78eeaeab92b14a441e08b6231f3a1c89fd99e SHA-256: 6d579e991fe4fe398f58e9231c43547feb7b5f9dc4367e507877089ffa731eef
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'https://cctraff.ru/strik?keyword=lean+body+hacks+scam', which is likely intended to lead the user to a phishing or scam page. The document also functions as a link farm, directing users to numerous other PDF documents, some of which are hosted on S3 buckets and Weebly. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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://cctraff.ru/strik?keyword=lean+body+hacks+scam In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/rapubobibusa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/2063494.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/4b14ed480.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/1300040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakef/minecraft_1.4.4_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/inoculation_method.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/nba_streams_reddit_76ers_vs_hawks.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/pijofadogajugugizav.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/34148248490.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/7761666857.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/file_b_li_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4410/7950/files/cache_cleaner_android_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/43062832979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8575/0976/files/combiner_plusieurs_en_un_seul_document.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/topenugokejorusiluxofep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8D 5296 bytes
SHA-256: df219e417892936db0918cf707b405876238754e9c6511294d7adf8830fd8932
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 11124 bytes
SHA-256: 2a7ba7c5acd9d1625b2758d3accc688e4fbcceb7e2d373c53f3e5b56cd72ab7d

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