Malicious PDF — malware analysis report

Static analysis result for SHA-256 081f6f73c44c9a28…

MALICIOUS

PDF

97.5 KB Created: 2020-09-21 19:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 762d1db173c7accd390a59cebb3ef1bd SHA-1: c062e3274f0abd401833f0db8a22ca53296359cb SHA-256: 081f6f73c44c9a28adbb5d402b05bf85f6317d2330a6b6e6e75d09f390adfe0e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'kolufase.savannahschneider.com'. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/wix?keyword=soul+hunters+best+heroes+guide', suggesting a lure to a malicious site. No scripts were extracted, but the presence of malicious links strongly indicates a phishing or malware distribution attempt.

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.cc/wix?keyword=soul+hunters+best+heroes+guide
    • http://kolufase.savannahschneider.com/uploads/1/3/1/4/131406352/vosaturorosubevetan.pdf
    • http://wafaxa.battlecomicsllc.net/uploads/1/3/1/3/131379608/paturubibaruf.pdf
    • http://gasafovan.mrscroninphysicalscience.com/uploads/1/3/0/7/130776167/1843a67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/22326994499.pdf
    • https://cdn.shopify.com/s/files/1/0431/6017/4754/files/gawegulazuvojuxilezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/36766476779.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/kabir_singh_bekhayali_song_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8589/files/zenunuvivuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/37219696816.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/cambridge_latin_course_book_3_translation_answers.pdf
    • https://912c163c-8baf-45ee-a435-6271ef70aa67.filesusr.com/ugd/96a426_35f5fd6521b6473d9edf2dec3a359577.pdf?index=true
    • https://de16d14d-a8bf-4664-b90b-3dc26f07ae0f.filesusr.com/ugd/cc1a03_61a6bb3284b0456eb67c0794c721852b.pdf?index=true
    • https://89e22aae-564f-4d1d-8aa6-c73ec64ab26f.filesusr.com/ugd/3bcfef_199595e0f4c9423ea0826bd68d250606.pdf?index=true
    • https://01d352e9-bcd1-4e6b-8c4e-ecda974e89a8.filesusr.com/ugd/d90490_2f8ba45cf8cd49d49d15162a72d80e52.pdf?index=true
    • https://1a8ab840-9c10-40fd-be01-b535f88228b6.filesusr.com/ugd/957eb4_0a40a5d0186a484aae2cfc40b6445b56.pdf?index=true
    • 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_off000142c1.bin
247e3dcddabda7971191db0048235b3b1d1d523b37a1bc9b87cb7e87cf8a614a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142C1 5120 bytes
font_01_sfnt_off00015418.bin
f55ad9aa8de46574ca4a5fa10fc293f360aff50799ede33487271c1959a7e2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15418 10772 bytes

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