Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b730e2d5153c79…

MALICIOUS

PDF

44.6 KB Created: 2020-10-25 17:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b1d8338fdc5e59a75dfc3b6ff30fc4be SHA-1: d3b4ca8ee7730fafbdbf2991a0287711607a78ff SHA-256: 38b730e2d5153c79d3a05b94e1a3fbd7f6caacd198d11730343c0eaf4cd08e20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is designed as a lure, masquerading as a "1995 yamaha kodiak 400 4x4 owners manual" to entice users. It contains a significant number of embedded links, with at least 30 pointing to external PDFs, suggesting a link farm or redirection strategy. One of these links, https://gettraff.ru/strik?keyword=1995+yamaha+kodiak+400+4x4+owners+manual, is identified as a malicious redirector.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?keyword=1995+yamaha+kodiak+400+4x4+owners+manual In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xulenutokibixa_terowigodaxuxo_pixabel_tafilij.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/5537249.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/1/0484/9690/2294/files/pathfinder_guided_hand_cleric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1838/7097/files/bohemian_curl_hair_weave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8526/4546/files/second_galaxy_apk_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7324/0739/files/lojaz.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/forupokisip/1827930220.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/sajatesawodiji/numbers_in_polish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7728/7070/files/67471102747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7229/4564/files/jegugobemabisagiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4256/0405/files/81508282137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70628dba-0b58-4054-a8bc-157b11f22a14/magnolias_de_acero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be67bfe-67bf-4ae1-82e7-a4932f4ca79a/cool_math_games_impossible_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2d9f80-b561-447e-b2e9-e2db3c301630/jujokexabakis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da04509-9937-4ce2-9cb7-60bcf63ffd54/vepamidazefoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1de708-6b2d-485d-90b9-4a6e3bc29746/jimuraridepawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/76746632776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/gas_testing_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8456/9494/files/radial_chromatography_lab_answers.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
    • https://cdn.shopify.com/s/files/1/0504/8In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 5856 bytes
SHA-256: dde62197663a1da005752115a120d0e4733cf2e6d5a0171118e7fd287ae18a10
font_01_sfnt_off00007e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E84 11172 bytes
SHA-256: 4de622352c3daa22fcefeee447e2fc0b4f51f509d16794a7344b1b1bb1d26ecb