Malicious PDF — malware analysis report

Static analysis result for SHA-256 545f74081a771643…

MALICIOUS

PDF

40.3 KB Created: 2020-10-02 20:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 72c8f3ff7b4cc5bd34c48cfc146a1133 SHA-1: eddfad49240046bbfd2ddac7c2c915f7dd3983d0 SHA-256: 545f74081a77164302581fc5e00c4774327e184431cb9c59ac725fc4fffce5c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits malicious behavior by embedding a large number of external links, constituting a link farm. One of the primary links directs to a known malicious redirector, 'ttraff.link', which likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicated maliciousness, supporting the heuristic findings of a malicious redirector and a link farm.

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.link/pify?keyword=nation+newspaper+barbados+facebook In PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/seliv.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/69533077418.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/xirosorekadatasuta.pdfIn PDF document text
    • https://site-1038376.mozfiles.com/files/1038376/buzujinaroboxa.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/xufafefapejubanamulonit.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/7d948d32-d6d4-44d9-9d65-5fdefee8d1cd/3003459011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5140db70-a8f0-47a1-93a5-cba8960c7dbe/98499799501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda85088-9056-48a3-90dd-ea50905e1b97/77097021997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2ed30a-15ca-4f1e-8cb4-fef0c51a0157/73425545991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f0ab26-64e6-4634-9d15-d25548289881/42999039096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/58510943890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7763/5748/files/44866706368.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 5384 bytes
SHA-256: a6fc55e178b6e84ef11aeced33ef4cd3067722bd2ef7658d8bbfc0ae1476c749
font_01_sfnt_off000071a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 10228 bytes
SHA-256: 75c801801bd7990386a9174a6f325335c24cdcc368cbfad2dc5eac4f3bd86db9

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