Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a01eb733b1634cb…

MALICIOUS

PDF

34.9 KB Created: 2020-10-03 15:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 43a056644333ae7ba6a2940f6617f0ba SHA-1: 7443e55717be6f1053ac07374793cd70bbec5148 SHA-256: 3a01eb733b1634cb7479d82eb0a2cc099ba94db5d76ac4d79b9654f10d741ffb
154 Risk Score

Malware Insights

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

This PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'project proposal' lure, and the presence of numerous external PDF links indicates a link farm strategy. The primary malicious URL identified is cctraff.ru, which likely serves as a gateway to further malicious content or phishing pages.

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=project+proposal+for+charcoal+briquettes+pdf In PDF document text
    • https://site-1042617.mozfiles.com/files/1042617/jipaxuxedoduno.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/bupafama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de41efe-c55d-45e1-8ed0-e118dba322ec/pipawaxijiparoxilodikame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51947437-ebfb-43e3-9d0f-7ad6c7158e58/rovevudexusegugozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc227011-e6f1-4ba4-9f6f-1a28d6625d49/3510864908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4888cb32-a8be-4b65-9c2d-eafccb8c0b22/boweniwifugosawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd798489-8703-45da-a270-0f2b05f1b320/fuzirolixeles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/61707843859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/75512403252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/dow_corning_795_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/delini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7773/0455/files/moments_with_god.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8210/8065/files/wellington_landings_middle_school_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1839/8107/files/80869198139.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_off00004963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4963 5588 bytes
SHA-256: 85322b6c467a65cde5542ac308f8bad43cbff4994bfe6b2457cc18cb8cf398c5
font_01_sfnt_off00005c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 10120 bytes
SHA-256: ce7d27fe27da5dfb6785af6f46af050394b563d6c4e42e748958cbb5f318f85e

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