Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a46d852d0036a20…

MALICIOUS

PDF

41.8 KB Created: 2020-10-14 23:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a886a8e8dfdd9cb5f109a83b88bc7b42 SHA-1: 626b4f417c49d8b564cc5fae99ad8f74f59514a7 SHA-256: 3a46d852d0036a20312158ad07146f859341216b737abff8ba55dd19b59399cf
184 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'skimming and scanning pdf' and the URL https://cctraff.ru/pify?keyword=examples+of+skimming+and+scanning+pdf, suggesting a phishing or malicious redirection scheme.

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://cctraff.ru/pify?keyword=examples+of+skimming+and+scanning+pdf In PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4096223.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/7904096.pdfIn PDF document text
    • https://site-1038985.mozfiles.com/files/1038985/98953880837.pdfIn PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/76037529215.pdfIn PDF document text
    • https://site-1041611.mozfiles.com/files/1041611/mezudek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f87165a4fee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8715be0142a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f871a5624e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8728e309d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f870f80a7f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873f016fc23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f875f1dc5258.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/wudipikex.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/tukowab.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1825/6035/files/76497087248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1129/2315/files/laburotizujupuzivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6875/4594/files/discipline_equals_freedom_tattoo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0863/8632/files/pofakaxixugasip.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_off0000660d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 5468 bytes
SHA-256: a2bbe3711fd15f803a3379b7f5065ce1713e22c5b2ff1c886fab873339c6dd1c
font_01_sfnt_off000078ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AB 10076 bytes
SHA-256: e4caf1217ffae57c2966e99d21ed1ad2f8066b0452b9d5a41df99c77f983fa7c