Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3723cf54f3b730…

MALICIOUS

PDF

42.1 KB Created: 2020-10-03 21:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ebe88c4228688d0f38a41725da17d615 SHA-1: 9c8cc473e24f715b2fce208b3a083f0febe7541a SHA-256: 6e3723cf54f3b730898c9b2e52780417fa1b4c1e2fdc3e1b1db2cb7c81376c68
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://ttraff.club/pify?keyword=ofsaa+track+and+field+state+results+2019'. The document body is obfuscated but appears to be a lure related to search results. The presence of numerous external links, many pointing to benign Shopify URLs, suggests a tactic to mask the malicious redirector among legitimate-looking 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/pify?keyword=ofsaa+track+and+field+state+results+2019 In 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/1/0488/3755/8437/files/59734164694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2911/0685/files/ib_pass_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5802/0000/files/bodalemetuwufudotizejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df92b795-ad9d-4756-a6b3-2004c1fd835c/59523181607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d70dc3-88e6-462e-adbf-770982e9af7b/47109787003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab12e6d-fb27-4b6f-abcb-30fae528f409/sobifigufimige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4794/8966/files/1085049138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/8222407409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/59315484423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/80441724424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0513/6024/files/direct_proportion_and_inverse_proportion_practice_set_39.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_off0000593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593F 5588 bytes
SHA-256: bccd36ef6ee0c411c64bef3b01275d69ef4d4e6f1e7d9927c07414dc8d0c9cd0
font_01_sfnt_off00006c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 15472 bytes
SHA-256: f2b35cde29aa72fab5f6a421c9122fa1ef23b0607d0bc104cbaf42b210c71af1

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