Malicious PDF — malware analysis report

Static analysis result for SHA-256 415db028eba1ebe7…

MALICIOUS

PDF

52.8 KB Created: 2020-10-05 07:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bd94bd6c126b337e98537f5adda95d18 SHA-1: 4977a2de9adc4a7ef4257b66f95f5fd2914df2ed SHA-256: 415db028eba1ebe7e3485998817fcf823eaffd5102b1ecdf441452a64e41c17e
182 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 embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or SEO manipulation tactic. One prominent URL, 'https://gettraff.ru/strik?keyword=the+odyssey+pdf+with+line+numbers', is flagged as malicious. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure suggests an attempt to drive traffic to malicious sites, likely as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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=the+odyssey+pdf+with+line+numbers In PDF document text
    • http://files.scchea.com/uploads/1/3/0/7/130738666/xuvasokabeg-bafuluxijirimu.pdfIn PDF document text
    • http://files.clarkforkpantry.com/uploads/1/3/1/4/131452950/4405077.pdfIn PDF document text
    • http://files.fullflightcounseling.com/uploads/1/3/2/7/132740463/xifofugix-debuwufi-nalowigem-koxexogugokup.pdfIn PDF document text
    • http://jumiv.jannacordeiro.com/uploads/1/3/2/7/132740815/20437.pdfIn PDF document text
    • http://dudak.carmenliuart.com/uploads/1/3/1/6/131637218/xodurelabazus.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/dijunomapavepurid.pdfIn PDF document text
    • https://site-1042729.mozfiles.com/files/1042729/16005836766.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/996ce2fc-dba2-49c6-822f-fc9396e7291f/jiporimol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a415a5-4fb5-48fd-989e-c9e551c71fc4/jagibowefiwuxikazuxigala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ba5634-50bd-4efe-a7d5-8a85451ec43e/tezazakotepodoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ee946b-e2cf-4cb4-814b-899d849822bf/58285250338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a1c9c9-b382-4142-93e3-9f66db05ca15/fizevobafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1448d4-6fdf-421d-9b0b-c2169c775c87/rigikutanalakipupuronenip.pdfIn 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_off0000a35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA35E 5236 bytes
SHA-256: b53613d23f99a3e2029b8377435005a24dcdcbf7d687c1e90798123a59da99c9
font_01_sfnt_off0000b50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50F 9892 bytes
SHA-256: b1cb984ea3f003129df3c7e9c719a33e9433c45a61f0d3ee58e93f79e803ff2e

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