Malicious PDF — malware analysis report

Static analysis result for SHA-256 2373f717e7d59984…

MALICIOUS

PDF

32.4 KB Created: 2020-06-08 17:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: c7f9964c126af1971511956b4285b7f1 SHA-1: 7fcf5711080ebc954bcbb00b8bfd796b1ad18f7a SHA-256: 2373f717e7d59984bee7228f1eaf91e6c2fdb26ad18d8314ca41110b9e4dfd1a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.com', indicating it leads to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body text, though partially corrupted, contains keywords related to service manuals, likely used as lures in SEO poisoning tactics to attract users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.com/wp3?keyword=canon+np+1550+service+manual#canon+np+1550+service+manual In PDF document text
    • http://kgf.serv4all.org/uploads/1/3/0/7/130776749/dadosaratog_vudibinij.pdfIn PDF document text
    • http://senowtees.com/uploads/1/3/0/5/130589126/3453522.pdfIn PDF document text
    • http://karlinekberg.com/uploads/1/3/1/6/131637595/2585182.pdfIn PDF document text
    • http://mta-sts.mx.charlesalexandermd.com/uploads/1/3/0/9/130969183/1050409.pdfIn PDF document text
    • http://stellarnonprofits.com/uploads/1/3/0/6/130639906/9536325.pdfIn PDF document text
    • http://vpn.stmartindp.com/uploads/1/3/0/6/130620972/fowosopa-ledepotutawa-nawuwimo-lofuziro.pdfIn PDF document text
    • http://desigrocerywholesale.org/uploads/1/3/0/5/130550797/tamipoze.pdfIn PDF document text
    • http://mlhmakeup.com/uploads/1/3/0/7/130776042/9775c270.pdfIn PDF document text
    • http://hostmaster.mehulshahphotography.com/uploads/1/3/1/1/131164046/wogorijesawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kudosemuzuna.files.wordpress.com/2020/06/ziwuragotufekuverubawokuz.pdfIn PDF document text
    • https://bebeleg.files.wordpress.com/2020/06/33811113143.pdfIn PDF document text
    • https://golarunujoki490965438.files.wordpress.com/2020/06/32638740516.pdfIn PDF document text
    • https://mapinazoten.files.wordpress.com/2020/06/10036979318.pdfIn PDF document text
    • https://jebituren.files.wordpress.com/2020/06/17604081305.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8B 12664 bytes
SHA-256: c404e6fbb9c780ac2a04c8303ea7459515ff90999f02ce39e26007a2a20f3ff6

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