Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b8006becf6baca…

MALICIOUS

PDF

120.9 KB Created: 2020-10-01 10:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 39f9c3ec240615dac2cfe19b1633cfec SHA-1: 1684ad78b365f612bbfa5bc911ea363b23f9d731 SHA-256: 09b8006becf6baca3e73d8c01e126d3ab8c5d87b8ad174825139e6927aca8c4a
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically 'ggtraff.ru', which is used to host a large number of other PDFs. This indicates a likely attempt to lure users to malicious content or distribute further malware through a link farm. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=bible+king+james+pdf In PDF document text
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdfIn PDF document text
    • http://files.wanderlens.ca/uploads/1/3/0/8/130874222/lolikosotesa-fitubizewego-gebom-vewiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a7df87-89e2-4ed7-b928-edb0143a0dab/27773250860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70825f2-1763-4b17-9435-4d7ac4aa9225/55897751906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffd95b7-0a05-4dae-a202-ffad853cb34a/xakavizowusovoxafonog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a381e711-3d02-47cd-8dc1-663e5354ac6c/38244915110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c6839d-e358-48e8-959b-9cbaab9036df/64386155951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a31779-ab0f-4a53-b362-a0943a496e18/fudigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe3b4ed-77fb-453d-ac17-fc7972f97ac1/86873172023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbabc27c-256c-46f3-9a50-dae504dd9de3/97559642483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e186171e-1c76-4222-9bdd-a6b578c7dcd9/sigebubigixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf0f606-9b43-4c00-b129-1eb1b66ecdec/81940609150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/cause_and_effect_essay_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0243/6512/files/nipasajovulatapil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/god_sent_his_son.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/23805260522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/51330692055.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_off00018dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DBF 5592 bytes
SHA-256: bc472a4d809bf49c8e99fcbc8c6cd8c23c710c8106fbeefa03b168e6281a9e6f
font_01_sfnt_off0001a0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C1 16676 bytes
SHA-256: e868e32790e3881ddd1ef858b2fb0b65590a635f512560e654f3011e2d4374c8

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