Malicious PDF — malware analysis report

Static analysis result for SHA-256 7185cc5d844a58da…

MALICIOUS

PDF

48.5 KB Created: 2020-10-30 17:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5cab54045967c381af57e9eb4f96975f SHA-1: 2d8d17067b9c4951305a4c6e2a2d204f352a93fb SHA-256: 7185cc5d844a58dae92f84e2e5d185204b4242cdf337334d54fc41f86f447372
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=dirt+bike+stand+harbor+freight', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=dirt+bike+stand+harbor+freight In PDF document text
    • https://rusizugijenu.weebly.com/uploads/1/3/4/3/134340450/rogelim.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/ea04f.pdfIn PDF document text
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/dakapifowojigu.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/fefiralepul.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/307e539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/basic_computer_knowledge_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4789/7256/files/66915474489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6c60ac-d584-4cd3-b862-3a5a928cfa94/fezobemute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5028/5218/files/52760191940.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/72150136026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c79b1ede-b2f4-43e9-b705-6922ffae1d46/99351778790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c3fa47-faff-4e55-b155-fdcddb5fba48/48879016979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ee7f38-8ae9-414a-a69e-68876bcc115c/virinitekitirot.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_off00008198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 5340 bytes
SHA-256: 853192f27747c817aa6e16834e38d52f132a4511a8107ce12bc77df8ee789355
font_01_sfnt_off000093c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C1 9748 bytes
SHA-256: c6b3be10f90cf606e746d30b6e25837e9b374cc688cb99a7b2574f70633890bd

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