Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e40f3eeb2011d9…

MALICIOUS

PDF

54.0 KB Created: 2020-08-14 18:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bc45d70c7cce6bfe072fa38a5b0345f SHA-1: 1be19802d5affe752153acfa90c9ad5bc82c1691 SHA-256: 55e40f3eeb2011d9f70760168d1919cbebf6b9ffb22fb3372ccb16c3f307a491
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document body and embedded URLs suggest a lure related to a 'companion guide', aiming to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=west+of+loathing+companion+guide
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdf
    • http://files.theoldguardofprinceton.org/uploads/1/3/1/3/131380666/gajesitosonekat-babadavifotiwiz.pdf
    • http://files.travelwhisperer.org/uploads/1/3/0/7/130774994/mikekunebig.pdf
    • http://files.shanehagedorn.com/uploads/1/3/1/0/131070485/7f3bf3175e.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/52341010960.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/complex_numbers_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/13263253222.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/mubodakasoxenudiponopop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/86495153454.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/building_plans_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/dujaburakesijuvoserujup.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/delis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/81247715233.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/10361787406.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/kimav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/73906971653.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000882d.bin
f285e01d3eae754a770a338e949a7ab6c05d985329db2dae67e5d2be40ef2707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 5368 bytes
font_01_sfnt_off00009a53.bin
dca6e4de2eb4ac3e89067e9d06db3a0d88e688e48d04f6bbeae043d15c054806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A53 10088 bytes
font_02_sfnt_off0000bcd2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 4324 bytes

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