Malicious PDF — malware analysis report

Static analysis result for SHA-256 d023b4bf9cf19c57…

MALICIOUS

PDF

41.8 KB Created: 2020-10-10 10:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7adc18c65dad9a3d3afb9f78ea31e7de SHA-1: f9469cf1975cb1ee741df4f926b19c1a48d38746 SHA-256: d023b4bf9cf19c576d740af16951c5e3e1e95524db68713e87dd199a155a89b3
124 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, with at least one identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the document structure suggests it's designed as a link farm to distribute traffic to potentially harmful sites. The presence of numerous links, including one pointing to 'ttraff.club', indicates an attempt to lure users to malicious destinations.

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 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=bash+bish+falls+address In PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/36361802244.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/setekagox.pdfIn PDF document text
    • https://site-1039847.mozfiles.com/files/1039847/19636051730.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/wezizujixuwesedofuweg.pdfIn PDF document text
    • http://rarogite.libertyshelties.com/uploads/1/3/1/6/131636664/wajigedire.pdfIn PDF document text
    • http://files.billzammit.com/uploads/1/3/0/9/130969220/2bcdd7cc7ca.pdfIn PDF document text
    • http://files.truckelele.com/uploads/1/3/2/7/132741375/f1d2a3934e9a.pdfIn PDF document text
    • http://files.literacygatewayinstitute.com/uploads/1/3/2/8/132814541/2843752.pdfIn PDF document text
    • http://lirimedef.iflightbook.com/uploads/1/3/1/4/131437294/6365793.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/1/0436/9799/5941/files/77391831189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2225/2189/files/netam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d1a425-5d05-4879-ad0e-7bd59bfaa763/tikutodowesojuxubujagozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688df642-b50f-4e02-bbf6-c898a94fc195/redaxavogewakigifinime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a00014-bb2b-4b60-9868-a36b5cdd994c/lutilera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05b5750-4f86-40fa-90ab-0cc1872b504d/81093557028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894b7474-d42c-4269-a9de-934fb298223c/48341379138.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_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 5184 bytes
SHA-256: 4aca06082c95333f266d66776890a9439df938fd4d97e7fae485a97c626a08f8
font_01_sfnt_off0000782d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10100 bytes
SHA-256: ce719807d9a9e320e88fe61bdd4d2e1793d44cd29a94a7ea251d9fccfc60760e

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