Malicious PDF — malware analysis report

Static analysis result for SHA-256 575725c8b409268e…

MALICIOUS

PDF

73.7 KB Created: 2020-11-05 22:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 318eebdd3846710b5b061f4c05c9494f SHA-1: e3023e4e29d8a7d8a5759a37bd7399eaca1ae26d SHA-256: 575725c8b409268e10dad7e8d53b3dae50f0fae1c54c969b44abd294b91791a5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://traffking.ru/123?keyword=grand+cherokee+zg', is embedded within the document body and appears to be the primary lure. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs indicate an attempt to redirect users to malicious or SEO-abused content, likely as a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=grand+cherokee+zg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8edee4913ce.pdfIn PDF document text
    • https://nipokilalupa.weebly.com/uploads/1/3/4/4/134485501/zukulobadasor.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/sufotasikawipugafe.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/fomuxijeju.pdfIn PDF document text
    • https://lerinajivawexof.weebly.com/uploads/1/3/4/3/134327174/wozozudu.pdfIn PDF document text
    • https://damafofazawarag.weebly.com/uploads/1/3/4/3/134369947/ae2458ca4.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/fumazafemikixos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lixasifasi/71160280321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844beb5e-c78d-4e7b-954f-5d8c5b81536d/english_language_spoken_in_norway.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/tuzakupiporip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d846f8a5-3d3c-4994-b36b-76916e5e07aa/moving_straight_ahead_investigation_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f0b91f-5450-43d8-8ea5-9c2f43e5bae1/nibivatazefora.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/levefujumekevebaluferi.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/lisozepexu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 2968 bytes
SHA-256: 282f83d0d60058b38b336e634da764e773fa7d01c86c0f43c0161739672667ca
font_01_sfnt_off0000d46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46A 4796 bytes
SHA-256: 7d52ef24004bf7a9b90ea1ea5d429d00987bfb9d2e5ba3732cbfea0f2d39aed7
font_02_sfnt_off0000e4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 11536 bytes
SHA-256: 36c39279f0ec4849d0595684b5f4f1564154546c72fa301d39f8e13a56cfe2c3
font_03_sfnt_off00010b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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