Malicious PDF — malware analysis report

Static analysis result for SHA-256 595539a15abe244d…

MALICIOUS

PDF

36.0 KB Created: 2020-10-11 02:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41da21e9e84b0b841bee596bd9e4cdbc SHA-1: 649c920307107bd3500793d4673556a75f15b73a SHA-256: 595539a15abe244d2e1a7a897840aed317a8dd23a970853fa287dac0d9717152
184 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its function as a link farm, directing users to a known malicious redirector. The document contains numerous embedded links, many of which point to seemingly benign Shopify URLs but ultimately lead to the malicious domain ttraff.club. This suggests an attempt to obscure the malicious destination and potentially leverage SEO tactics for distribution.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=r410a+refrigerant+lowes In PDF document text
    • http://files.bigbandflorida.com/uploads/1/3/1/4/131408209/duvagelo-megexovilaji-mekeb-xinezegilobisog.pdfIn PDF document text
    • http://pirax.calvinpresnorfolk.com/uploads/1/3/1/4/131437233/gogig.pdfIn PDF document text
    • http://files.udaratherapy.com/uploads/1/3/0/8/130873715/tixoj_mumuzarururivij.pdfIn PDF document text
    • http://sulufuw.nscecommerce.com/uploads/1/3/1/4/131453526/debojijapuwuf_vuxukewa.pdfIn PDF document text
    • http://files.dcimproper.com/uploads/1/3/1/4/131438453/7814778.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/87824700119.pdfIn PDF document text
    • https://site-1039257.mozfiles.com/files/1039257/45014743634.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/vizexixupugagawuxixase.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/98186459380.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8785/9354/files/parker_middle_school_taunton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6790/2626/files/zero_factor_property.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8847/2983/files/pitowaminupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9036/9959/files/50992593678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/chicken_dressing_casserole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/41540297232.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C98 5316 bytes
SHA-256: 3c6751ecba59e2a1db2ec8f10ffba1327e42d2effbd40e42b3a4d2473abe18b7
font_01_sfnt_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 10660 bytes
SHA-256: 9259f740f1b9896dd5a6b92e281a7eaf0864afc85e21e37357a9945a4af32494

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