Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9099465d6b8554…

MALICIOUS

PDF

50.8 KB Created: 2020-09-03 19:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a458bd83839dc98d13d76f65b9bfcfd0 SHA-1: f5b2cfae7a46b1af27c17ea85d85e292687b61d8 SHA-256: 6c9099465d6b85544d82c78ec70c772f9bcfaeaff179163c8d854d381168a172
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a search result for piano sheet music. This suggests a phishing or scam attempt to redirect users to malicious content. The PDF also contains a large number of links to other PDFs, indicating a link farm, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.club/wix?keyword=fur+elise+piano+sheet+music+grade+3 In 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://static.usrfiles.com/ugd/3ab5ed_691df774f41649f9b817962df5c92c2c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90c678_d2b0b3d93d594e4da202a9243e4a116e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a421e3_d19e865840224212afee0c95acbbc388.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/43d598_65662d59a1e64ee597f91020727db07a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/71fd01_c12847ecb07d4e8083871234ec26af8b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/72635262000.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d902bb_f7a61c6fb162414dbcd6fefc3822951d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/defd8a_0d1a511f02314d51828b28eeab569a07.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/40512e_78d07e3913d04cdcb0a3b4833bf6a988.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ca8b31c9d3a34512a3594702ac7bedb0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/jitovazalasopobimuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/butterflies_are_free_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9327/8117/files/world_of_warships_british_cruisers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 5488 bytes
SHA-256: 678f1bf0fc7eff66256256eeef893eb560364bd5169d40e63f024e9c2b3cb07e
font_01_sfnt_off00007e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E15 15508 bytes
SHA-256: 9dec5de17b139f1a1252d9c6e1da9e02e72094adef7f3f2afe1402e2dc769a05
font_02_sfnt_off0000ae08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE08 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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