Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac9aae7e62b06b7…

MALICIOUS

PDF

36.4 KB Created: 2020-09-17 08:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 232e77c27065e14b6da37e13452e463b SHA-1: b2149140c14dab2eb21e9609be3674acf08583fa SHA-256: 0ac9aae7e62b06b7df1e1cc51e8604fa1b9f4661fc94bfc61e25f0a76be2cd9e
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files hosted on various domains, many of which are flagged as disposable or potentially malicious. The ML classifier strongly indicated maliciousness, and the link structure suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the overall structure points to a link farm attack pattern.

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://ttraff.me/wix?keyword=construction+project+management+a+complete+introduction+pdf In PDF document text
    • http://files.commafultips.com/uploads/1/3/0/9/130968933/nesebugitovezi.pdfIn PDF document text
    • http://files.bamabreddoodles.net/uploads/1/3/1/1/131163705/5706947.pdfIn PDF document text
    • http://files.osntc.org/uploads/1/3/1/8/131857334/dutivus.pdfIn PDF document text
    • http://files.johnfishersculpture.com/uploads/1/3/0/7/130738993/abc76ee15b84.pdfIn PDF document text
    • http://files.kspaceonline.com/uploads/1/3/0/8/130874075/zupewusilow.pdfIn PDF document text
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdfIn PDF document text
    • http://wusesu.onlinestation.in/uploads/1/3/1/8/131871921/gonupej.pdfIn PDF document text
    • http://files.thermalplug.com/uploads/1/3/1/3/131383665/lubojudarevifoxitofa.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/1/0435/4847/5541/files/bawoletudaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/mezzo_forte_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/dna_structure_to_profiling_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5387/5105/files/66917175871.pdfIn PDF document text
    • https://afb2ed2c-1461-4167-88c1-c7ed366265ab.filesusr.com/ugd/e2c223_1ff62570bb8e42d9b0f28be7acf70f0d.pdf?index=trueIn PDF document text
    • https://949f3076-ffb1-4fc4-9a89-9f6b5501dab1.filesusr.com/ugd/5926b4_dc81763f9d2b4b609282fb3d0a42ea65.pdf?index=trueIn PDF document text
    • https://44ecccc0-8f39-41b1-9a77-922a2d5c6f08.filesusr.com/ugd/47e66e_33fadc08650e446ca41120104b04fa87.pdf?index=trueIn PDF document text
    • https://dff0fa70-dac2-4e83-b80f-d73cf398705a.filesusr.com/ugd/2eff39_0ab88be485b8482d90b3aaf8a9131e1b.pdf?index=trueIn PDF document text
    • https://c6758cea-46f7-4847-a585-c975f1f36427.filesusr.com/ugd/622218_eeff5dd47df944569f4333cef3120b0a.pdf?index=trueIn 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_off00004f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5D 5456 bytes
SHA-256: 76a26147f123b803a436c17de89292d4912876242841f64731869fc16d0548cd
font_01_sfnt_off000061d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D7 10032 bytes
SHA-256: 46f4f9a5d2473aa0673f9399e4bbcf1575416f26afb99eb4fd6cf92ca213612a