Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1668ac250160065…

MALICIOUS

PDF

37.1 KB Created: 2020-08-22 12:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53185a76db72bb77732b8120ec54a56d SHA-1: 791aa0ea57c35bb7a92df3841d3a7ebd17f50ad3 SHA-256: d1668ac25016006547bb0a361ebb8eccd343aec0f2e5352a7a6a66962cb3f544
120 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, specifically pointing to 'https://ttraff.cc/pify?keyword=algebra+nation+section+7+answers+pdf'. This URL is presented within the document body, disguised as a search result for educational material. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs. The primary malicious link likely serves as a lure to a secondary malicious site or payload.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=algebra+nation+section+7+answers+pdf
    • http://files.misstimstravels.com/uploads/1/3/1/8/131871602/sugaf_riniva.pdf
    • http://rabom.bsl-sc.co.uk/uploads/1/3/2/7/132741508/xutalebegogakepona.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/rugofepuwosuronakuwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/50649552745.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9197/files/crimes_contra_a_administrao_pblica_resumo_concurso.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/4855769619.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/97798627002.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/15409665119.pdf
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/mopujijutuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/biostar_handbook_student_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/zudoxobox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/vande_mataram_movie_songs_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/97920877839.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d7.bin
7eb2a53ca459914ff76cd777e7a17dcbc767c62e0c8ece7ad031a29b4bfeb645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D7 5412 bytes
font_01_sfnt_off00005859.bin
39db8200d88dd3315dcef2e3ef44e140909c6f8dfdbee76b2df9b1f3d87bb75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5859 10000 bytes
font_02_sfnt_off000079ba.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 4324 bytes

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