Malicious PDF — malware analysis report

Static analysis result for SHA-256 329c6e47c0f3787c…

MALICIOUS

PDF

68.9 KB Created: 2020-11-13 17:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd614ded53c9037602415d9edc189c0e SHA-1: 125998e12f0cb1a982d3bb24f17d1b306adfaeae SHA-256: 329c6e47c0f3787c85f2a43fdd53f924b913260ca51e9a4ce3218ec1b8a0130c
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://gettraff.ru/123?utm_term=security+national+mortgage+company+payment'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, some of which are hosted on S3 buckets. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=security+national+mortgage+company+payment
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/5421372.pdf
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f9f6870c9271.pdf
    • https://cdn-cms.f-static.net/uploads/4424013/normal_5fae62a156f3c.pdf
    • https://pofewapat.weebly.com/uploads/1/3/4/0/134018592/towaronotakoru.pdf
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/6be051bfca11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/madegusulepugif/ninja_cat_the_game_unblocked.pdf
    • https://s3.amazonaws.com/tuxexi/kuvijolisaxabikaw.pdf
    • https://s3.amazonaws.com/xamibudasagas/pelajojijujuzebuka.pdf
    • https://uploads.strikinglycdn.com/files/b484d89b-533b-4482-8fe8-da9d410fec7d/2005_yz_125_manual.pdf
    • https://s3.amazonaws.com/tulosa/alla_prima_by_richard_schmid.pdf
    • https://s3.amazonaws.com/vokeri/49866708691.pdf
    • https://s3.amazonaws.com/muvemasoxaji/lil_wayne_agency.pdf
    • https://uploads.strikinglycdn.com/files/c4486e10-89d2-4f92-a5fe-0e867752111c/51011353040.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_off0000d06c.bin
ab129c9af35a5fdb69576a732e71de1a06da3f71680855023102a874da4905f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD06C 5280 bytes
font_01_sfnt_off0000e25b.bin
57360bf7c844e11f9a4dc050c81526898157893e2a86f9c21397fca8ef37742e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 10676 bytes