Malicious PDF — malware analysis report

Static analysis result for SHA-256 776ac3fd8149453e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 04:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7397916e4a8622ee505cc4efa4043499 SHA-1: 30a50c53bd7f3cd78f08b3b852e3b9c974b05df0 SHA-256: 776ac3fd8149453ee23ef1cf4066605ef7872640f1000561034fde7768ce216a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be a link farm, likely for SEO manipulation or to distribute further malicious content, with the ttraff.com URL being a key indicator of malicious intent.

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.com/wix?keyword=world+of+final+fantasy+best+mirages
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1d50b7e52fc346ba9299f91c652bb6f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b2115eef2e4ebab3a169ad319f4ed2.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_610087da97ee4aa5bbea5162e3a9aff9.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/59245302268.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/present_perfect_past_simple_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/destiny_2_air_move.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/wipavotaranobopugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/46707143048.pdf
    • https://static.usrfiles.com/ugd/67f5f7_64fce09f74374b6a9420b9e3d07a1e88.pdf
    • https://static.usrfiles.com/ugd/b8c837_14528a42e0e348f6a6ba60112970bfb4.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_off00005f22.bin
b837b14e8af8996e0173b1b439702dbeeb5b245b2c29634ac5f7fe5dda026ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F22 5484 bytes
font_01_sfnt_off000071c8.bin
44439386c66fc628c38d4da67d82a2976f64f9ccbc050a9c2ec856a81c92fe77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C8 10016 bytes

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