Malicious PDF — malware analysis report

Static analysis result for SHA-256 b774d0554d99ce85…

MALICIOUS

PDF

48.5 KB Created: 2020-10-14 19:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f755e7bc90a18a51d591f35af7f31bf4 SHA-1: ff8818c6a59d56d26d0d195cb29ccc7f322f840b SHA-256: b774d0554d99ce8553523db0869f3e0858ae83abca92d9cc5a234e80d14e6bb7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links pointing to external PDF documents hosted on various domains, many of which appear to be disposable. One of the primary links, https://gettraff.ru/pify?keyword=pavement+design+manual+txdot, is flagged as a known malicious redirector. This suggests the document is part of a link farm designed to manipulate search engine rankings or to distribute malicious content indirectly. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/pify?keyword=pavement+design+manual+txdot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f5e3e7ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8705a050e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f42213348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8708ed62ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8714e0046d4.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/puvadev.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/mukag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c87a66b-90a9-4df2-a870-665b5dcff773/vimiganisotazofufalutefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e665ab-74fa-41bc-a9f3-5d4df8f24778/91629330344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/nomivipolekabiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2179/3942/files/ragibuturadibowini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/76646474594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/new_scofield_reference_bible_1967_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0277/3440/9406/files/anti_aromatic_compounds.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_off00007eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 5180 bytes
SHA-256: b0e0d7f4016caa16d083d49df910564fd3b98e4698ab3484243d9e8b4bca14b2
font_01_sfnt_off00009049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 10796 bytes
SHA-256: 9abfd8c6207be72dc09b9ee40cc7f8191f30c5de1cc9646d463afa1bf1dea16f

Open this report in the interactive analyzer, or submit your own file for analysis.