Malicious PDF — malware analysis report

Static analysis result for SHA-256 0329e8171d782d9b…

MALICIOUS

PDF

36.6 KB Created: 2020-08-03 07:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4d221046d1ba8c9accd6041e91dfdf SHA-1: 44213df977771b29ad15d6167c8e4b6d1882a1fb SHA-256: 0329e8171d782d9bb502abbf5d72908531b833d655183c8da24c7be5568e4ddf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'bowflex xtl assembly manual pdf' and the URL https://ttraff.cc/pify?keyword=bowflex+xtl+assembly+manual+pdf, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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=bowflex+xtl+assembly+manual+pdf
    • http://files.benes.edu/uploads/1/3/1/6/131636719/166fe13eb916.pdf
    • http://files.firefallseffects.com/uploads/1/3/1/4/131453199/maruroruluki.pdf
    • http://files.burstingbarnsministries.com/uploads/1/3/1/8/131856852/desukumip.pdf
    • http://files.playguitarsolos.com/uploads/1/3/0/9/130969041/c0d074ac3640a5e.pdf
    • http://bidesabi.padisciples.net/uploads/1/3/0/7/130775219/d5a2de30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/tisikumek.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/31957949165.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/39277492627.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/zexomoruzaluxenikinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/defelunipitoriko.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/fekef.pdf
    • https://cdn.shopify.com/s/files/1/0439/6069/6990/files/mcm_roman_numerals.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/61060713626.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/babujupugapudud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/zijibuguzozuxozafuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/mopukituduv.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_off000050cd.bin
b9ae737e728d54e972269c4850e30009a68b4829596ae376ea7fc7b1f2ffb23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CD 5540 bytes
font_01_sfnt_off000063b4.bin
c455a671512188bf8c2a603020c2459a59e0c63663d3f74c4eabee5e15dc94be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B4 9888 bytes

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