Malicious PDF — malware analysis report

Static analysis result for SHA-256 17860988b8e13084…

MALICIOUS

PDF

45.7 KB Created: 2020-10-30 16:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 909f1362e9cfaa40b517d93574a35e16 SHA-1: 1d681b228e3a7be876aadba002e3bb8c9d2ecf48 SHA-256: 17860988b8e1308428297cd874bb9f18c83436fdad45f07b8b016be4d4ff2e4a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of embedded URLs pointing to other PDF documents. One of these URLs, 'https://ggtraff.ru/aws?keyword=directive+control+supervision', is flagged as a malicious redirector. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content, aligning with a spearphishing attachment tactic.

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 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.
  • 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://ggtraff.ru/aws?keyword=directive+control+supervision In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f879d6090d0c.pdfIn PDF document text
    • https://kifenefaru.weebly.com/uploads/1/3/4/3/134327755/6966443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5f95b8c89abde.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/fovofexupiwudek-teturudugog.pdfIn PDF document text
    • https://vafumavuforowa.weebly.com/uploads/1/3/4/4/134489815/gebejonobijokub_nivured_ganiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f91140b3aff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_5f96cd67b5e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f91fc109d7d9.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/b757bd1d-1860-4912-9558-a57cdf9dbaa3/tipotelaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34782538-84ec-498c-942d-c637de572dff/ravuvakapoxiwaravo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/burton_malkiel_a_random_walk.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/40701539353.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/adjektivdeklination_test.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/apprendre_l_espagnol_livre_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/relujisotevebolomepuzug.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_off0000754e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 4776 bytes
SHA-256: d2e71042b5d01cec18d28d886880320679d402a3bd165050f74287bcdceac6b5
font_01_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 10616 bytes
SHA-256: eba89cd6661042def334d51cb4edb2132e16d6678e7063a13f4f820f00b2c874

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