Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a0c56699bc731d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-10 12:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 796227f6eef3e434c75c0b0c9de0d59f SHA-1: f3c3267ba1f684d2b4212bfede912cbf14ccb4e6 SHA-256: 75a0c56699bc731dacfce9e1ede0302866dcdd0174c6c4efa41b0707ccb60604
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a download for 'Avengers theme song sheet music pdf'. This indicates a phishing or malware distribution attempt. The document also contains a large number of links to other PDFs hosted on various domains, suggesting a link farm used to obscure the malicious redirector or for SEO poisoning.

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/pify?keyword=avengers+theme+song+sheet+music+pdf
    • http://files.sketchingshadowsdigital.com/uploads/1/3/0/9/130969085/2711156.pdf
    • http://files.bathhousebasics.com/uploads/1/3/1/4/131453645/4182052.pdf
    • http://files.chiodobrokerage.com/uploads/1/3/1/4/131438038/pajuzo.pdf
    • http://files.mitchellband.org/uploads/1/3/1/3/131383657/roxozunodofuro-fafulujesimozi.pdf
    • http://files.stevecarrollartist.co.uk/uploads/1/3/0/9/130969301/lisesajijuvomitiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/6243811647.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/55565683986.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/33797333147.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/8486049700.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/mijodabemavezojatapo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/52454021948.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/jizakuzuranafuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/109980943.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/jatapumowadanewaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/wekigagemebezalikifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/fagurevegifofutedeniniwow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/mario_kart_ds_rom_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/ub40_kingston_town.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/vosixipu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da0.bin
ae48a129a7ffe4a903023b429e8ff3ebbebee301f71ebb5603f4c62664ea9f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA0 5376 bytes
font_01_sfnt_off00005fd5.bin
81ec3c8cc583cb2689233971dc931b01252ed5d9105b2cc241a386dd7750beb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 10188 bytes

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