Malicious PDF — malware analysis report

Static analysis result for SHA-256 874d269a7a6377e8…

MALICIOUS

PDF

61.3 KB Created: 2020-07-09 11:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50c31c5aeacb0372d2aa2711ee299542 SHA-1: b616678906598b06e608e4ed801c5295bb6e03a7 SHA-256: 874d269a7a6377e8fb4f5c1a75f1fc096163d0e9b353f7cf1f2526c37294bfc7
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable domains and are likely part of a link farm for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=donald+winnicott+biografia+pdf'. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful 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.com/pify?keyword=donald+winnicott+biografia+pdf
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdf
    • http://files.reneegiblin.com/uploads/1/3/1/8/131856950/fff120.pdf
    • http://files.warrenplainsbaptist.org/uploads/1/3/0/7/130776739/nusapajoguli.pdf
    • http://files.sharingprosperityusa.com/uploads/1/3/1/6/131606631/bc581f8ff0.pdf
    • http://files.rosewoodranchmn.com/uploads/1/3/1/6/131636700/mufotap.pdf
    • http://files.ajeplanners.com/uploads/1/3/1/4/131406816/sifojopese_nidukuzinagimo_xutokajofuzi_roxurugar.pdf
    • http://files.hurdsfieldnd.com/uploads/1/3/0/8/130874541/jobidajixugo-legelodudopaku-ganasimumedov.pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://gizogud.files.wordpress.com/2020/07/48522539018.pdf
    • https://sefofulevap.files.wordpress.com/2020/07/gonavid.pdf
    • https://muxolapa.files.wordpress.com/2020/06/lamuturiwokejoluwo.pdf
    • https://seteletunifa.files.wordpress.com/2020/06/36625036354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20807514836.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b433.bin
49f904656294701648ef618005693ac7d41e88823c4bf4da2e4dad5e18582d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB433 5044 bytes
font_01_sfnt_off0000c570.bin
5fb9f61748de40d363e0aba476bddebb7ef30474691b60436ab022ccb2511fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC570 10188 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.