Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6831822bef6ed01…

MALICIOUS

PDF

48.3 KB Created: 2020-08-27 20:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e0a51c1bc96107d59c47b7e719c667 SHA-1: 1bcfeee42c66f1961c90d76211718398e101243c SHA-256: a6831822bef6ed01b17849d1e1452f5ec2d2503d773246c8e5dfceae46f05b91
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=darksiders+2+drenchfort+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user into clicking the malicious link. The presence of many other PDF links indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious destination.

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://ttraff.com/pify?keyword=darksiders+2+drenchfort+guide
    • http://files.godard-christian.org/uploads/1/3/1/4/131453543/xipokasavole-jojutoguviso-sizopilelasirab.pdf
    • http://files.jessicatruscott.com/uploads/1/3/1/6/131606035/8328657.pdf
    • http://jatuju.silfradentasia.com/uploads/1/3/0/7/130738971/ragon.pdf
    • http://files.pelicanlearningsolutions.com/uploads/1/3/1/0/131070912/12d28124b.pdf
    • http://gereta.royalsunset.to/uploads/1/3/1/4/131453870/f4ee043.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/arundhati_tamil_movie_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0434/6832/5029/files/86610406549.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/burlston_chair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/6479/2990/files/lituzikorowotiles.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/pifoxuxofexemupijafis.pdf
    • https://cdn.shopify.com/s/files/1/0445/5114/3588/files/american_college_of_rheumatology_lupus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/99144494088.pdf
    • https://cdn.shopify.com/s/files/1/0463/4175/0945/files/5905418100.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/rulol.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/dunuborifudegadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/pure_imagination_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/acreditao_ona.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/wezurasegol.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e5d.bin
c603208ccfedc05938dd9f03ffc6523857574927d0ed01028a86c47bb4cfffc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5D 5448 bytes
font_01_sfnt_off000090e4.bin
9c40542f253c63c93a0b004cf0d4f2d34be3db8c0f4b5538387103760279e250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 10396 bytes

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