Malicious PDF — malware analysis report

Static analysis result for SHA-256 6772a289c0de3c9b…

MALICIOUS

PDF

50.8 KB Created: 2020-08-13 21:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e4352cc319e7d2db290a221241d50f SHA-1: 467ded8ec8d8f8eb22142f13586af1a2be4a5d77 SHA-256: 6772a289c0de3c9b75b96ef82cffd920b3e16363e486ce4453df856b46db8831
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 'ttraff.com'. The document body also contains this URL, disguised as a 'Gloomhaven spellweaver guide', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links further indicates a link farm or redirection scheme. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link embedded within the document.

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=gloomhaven+spellweaver+guide
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • http://goxugi.pellegrini.store/uploads/1/3/1/3/131380594/dixavufisuvep-toxugupen.pdf
    • http://files.quintessence-abq.com/uploads/1/3/0/8/130874180/294a334.pdf
    • http://files.lccyearbook.com/uploads/1/3/1/0/131070161/dibogu.pdf
    • http://files.sdlsf.org/uploads/1/3/1/0/131069819/8067b0c65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/list_of_diploma_engineering_colleges_in_mumbai.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/niluwonugosige.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/vofezegikazekoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/94819658964.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/the_book_of_giants_dead_sea_scrolls.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/15055256017.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/marine_boilers_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/begugasilokividosigosad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/accelerated_c_github.pdf
    • https://cdn.shopify.com/s/files/1/0453/9475/5752/files/nickel_iron_alloys.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/fudafokewakutegav.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_off00008541.bin
c096904d3e07491fa33752530540f8ac7f15172740d51eb8b35253131c174b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8541 5556 bytes
font_01_sfnt_off00009818.bin
50e585c351cf687ad79939ec656ddc61fcdca849b05d5fea1d4ae51963a031ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9818 10744 bytes

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