Malicious PDF — malware analysis report

Static analysis result for SHA-256 07495295ffb9efe3…

MALICIOUS

PDF

41.3 KB Created: 2020-09-20 19:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c72d867917497717cec48b3db28aa7 SHA-1: 632a0390dc9dfc035800ae2160a480ee20f69f33 SHA-256: 07495295ffb9efe39363c0dee4924c579273f75faefa5b24e3cbd4a84f5d9040
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or unknown domains, indicating a link farm for malicious redirection. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.link', suggesting a malicious intent to lead users to harmful content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=scp+containment+breach+builder+bear
    • http://temuwuw.vfwpost10452.com/uploads/1/3/1/3/131398440/ef97d82e8.pdf
    • http://files.awestar.org/uploads/1/3/1/3/131383380/fazox.pdf
    • http://files.row4victory.com/uploads/1/3/1/4/131413766/bolulixilekuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3cf7db27-6e35-4e11-8510-a0027e42b54a.filesusr.com/ugd/f5bc2a_e7e323993d584d1b829cf31a3db5ff6e.pdf?index=true
    • https://a92e0b73-7791-4d92-951f-147ac726b124.filesusr.com/ugd/23e9be_f7a4aad0c2a04ddf90fff476407c9189.pdf?index=true
    • https://93d1b7b8-aeba-4531-9d5d-0ea43affc095.filesusr.com/ugd/7be1cd_ad865537fce14268ac3585ac7bcf4c00.pdf?index=true
    • https://3c528081-55c0-48c6-8045-294a5e296aa8.filesusr.com/ugd/5a1791_06cb4a389370466cbf29c5e2803ad949.pdf?index=true
    • https://b50a9efa-584a-43ec-a1b5-082defbbf447.filesusr.com/ugd/5b604d_f5801d2088f448b18fb703d85277f424.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/2426/6917/files/nalumalat.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/firusujamobud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/wutefijunigasobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/gurusinuxowirewuxezexaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/centrelink_report_update_failed_2018.pdf
    • https://cdn.shopify.com/s/files/1/0480/4322/9348/files/craigslist_boise_commercial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/30790389627.pdf
    • https://cdn.shopify.com/s/files/1/0466/3679/4021/files/33731386173.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640b.bin
574d8ea1cdc533c0802b0862421c45d8903207c3f8a9a036741e9129f0adf947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5376 bytes
font_01_sfnt_off0000761f.bin
9045f8c2f5b542eb7188ff4a7f72ad277ce5243df376486ad83ef402a75a0581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 9984 bytes

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