Malicious PDF — malware analysis report

Static analysis result for SHA-256 f973859a7125a1bf…

MALICIOUS

PDF

36.8 KB Created: 2020-11-04 04:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d4c1e3d085c2563b3c90f30373eed544 SHA-1: 9d68991f731fda11bf4d5d0d4268ad2c682b8365 SHA-256: f973859a7125a1bff4d64164b21346a61f53243acf51706ca1c4d8c5d9a22148
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of links, many of which point to disposable hosting services and redirect to malicious infrastructure. The primary lure appears to be a promise of a free PDF download, which is a common social engineering tactic. The embedded URLs, such as https://ttraff.club/123?keyword=words+can+change+your+brain+pdf+free+download, are indicative of a link farm designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/123?keyword=words+can+change+your+brain+pdf+free+download In PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/28fb8d.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5ed7cc.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/vepedeb.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/3608ddac247b53.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/panarur_xagugogiwula.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/98c379e295f505.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/1bf7a66e4791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5f9ddb6ce99a3.pdfIn PDF document text
    • https://vigaziwow.weebly.com/uploads/1/3/4/3/134322068/9463692.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/df01da32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_5f98f45f89006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8b1b2c007a7.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/regegozumekoza/homerun_in_berzerk_land_2_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/affairscloud_computer_capsule.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F46 5764 bytes
SHA-256: 69322bb319ec0e953340a46d22414208fae1777c300f7d6dae20e4761f77ba1b
font_01_sfnt_off000062ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 10248 bytes
SHA-256: 5ea14cfe584e20fd1c30e5fc5a5b0a048d95481f29fe37cb09b3890450ce9c09

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