Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efcc2b98344f7f0…

MALICIOUS

PDF

46.7 KB Created: 2020-09-17 05:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4efaeec047acd61de24a54f2706883f SHA-1: 16699e8775a8e1c63669a294da1e267ce9bb4261 SHA-256: 1efcc2b98344f7f01e9f175736eb1fb5612ea1a7182ca893456de66faab40a3e
184 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious sites. The document body, though partially corrupted, contains text suggesting a lure related to 'Brida Paulo Coelho pdf Indonesia' and includes the malicious URL. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves SEO poisoning to distribute malicious links.

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.link/wix?keyword=brida+paulo+coelho+pdf+indonesia In PDF document text
    • http://files.thordonaustralia.com.au/uploads/1/3/0/7/130738637/07dee19.pdfIn PDF document text
    • http://files.dogoodstore.net/uploads/1/3/0/7/130776249/vibubokisexan.pdfIn PDF document text
    • http://files.robynholland.com.au/uploads/1/3/2/6/132682281/gologikewudasebagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://efdf2754-479c-4b3c-8c74-5b208a75760d.filesusr.com/ugd/ceb2e8_6ae2111d0ee64d26bb60507a2d21fc29.pdf?index=trueIn PDF document text
    • https://237aa693-7ac9-496b-958d-19980e311d7d.filesusr.com/ugd/717a42_bf2bd0983f50440a9fe9d648f2058132.pdf?index=trueIn PDF document text
    • https://4a8517b1-b158-48ed-a804-7de82dec455e.filesusr.com/ugd/01f9b9_5f365e20661c476e9c82af0f4ae459e6.pdf?index=trueIn PDF document text
    • https://28f35db6-155d-4b4d-a1c5-550c29e07e0e.filesusr.com/ugd/868b90_57956e2549034da8bd6adc5c083955dc.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3177/3852/files/beginner_level_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/meneforevixafewurudekasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4186/6137/files/gseb_class_10_science_question_paper_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9506/8567/files/regression_analysis_by_example_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/tipifunobebukozoti.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 5292 bytes
SHA-256: 25c69f1af974c07ceb672383071e348cb6e10e91c34942a74251ea73ac193d85
font_01_sfnt_off00008825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8825 11464 bytes
SHA-256: 29f8b91794e20d548a35fe3785ccff56e0cc93b22323e025a5bda237c4d6884c

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