Malicious PDF — malware analysis report

Static analysis result for SHA-256 6521ef6ec9adee27…

MALICIOUS

PDF

45.2 KB Created: 2020-07-23 02:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2315a83882b746273e5c2ac8b31b49a9 SHA-1: 6a27d4cead198e71e4649548ce01a19f09e62df9 SHA-256: 6521ef6ec9adee27583c5b76b29f9510d091acb86e7b7a83acd01b55eea8d67e
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a redirector and link farm. It contains a large number of embedded URLs, with one pointing to known malicious infrastructure (ttraff.cc). The PDF structure and embedded content suggest an attempt to lure users to external sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9526161-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9526161-0
  • 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/wb?keyword=5e%20cleric%20spell%20list%20pdf
    • http://files.sailabilitybatemansbay.com/uploads/1/3/1/4/131482866/8472647.pdf
    • http://files.beworldwise.com/uploads/1/3/0/9/130969041/2a52b162c987.pdf
    • http://files.lindseysbbqnmore.com/uploads/1/3/1/4/131406807/notubew-mekowuki-nifibonik-foxolobutokaguj.pdf
    • http://files.wanderwellfitness.com/uploads/1/3/1/4/131482931/lonizegapitevetas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/86164480123.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/8440811038.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/tetaxasekerapurusunebem.pdf
    • https://sefofulevap.files.wordpress.com/2020/07/29526161789.pdf
    • https://zuporewa.files.wordpress.com/2020/06/54952318518.pdf
    • https://fububoxoludi.files.wordpress.com/2020/06/jitoju.pdf
    • https://wozutixepuna.files.wordpress.com/2020/07/domaxamojokavipidelo.pdf
    • https://zodijuva.files.wordpress.com/2020/07/77299584574.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/33122250650.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/88921424456.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/57814706165.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/64900484705.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/95339956464.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/monofosilovolaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3807/9138/files/28076582240.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_off00007603.bin
3fc00b9dff4edd53818d7f272e6c2672b82582995fb9faa79f331f0fe4ce8e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 4540 bytes
font_01_sfnt_off00008581.bin
a12ba825758f6ce13b6fc112bc7154f34bfd1eb1d213a3440a14acec8114c39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8581 10044 bytes

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