Malicious PDF — malware analysis report

Static analysis result for SHA-256 0183715a851d5da3…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 17:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0582a61c28d29ac9e9bc8b4ee1994794 SHA-1: d948257c08c5cb161d6da5c673c582a615f8711a SHA-256: 0183715a851d5da3508923f9a39a05068bb111c236206c9ef086c130672d56c6
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=camera+lucida+microscope+pdf
    • http://files.oceanaparkwelshstud.com/uploads/1/3/2/7/132740352/tebivoxufameb_xures_gebinu_natuwizulosano.pdf
    • http://files.evergreenpark1171.org/uploads/1/3/1/6/131637919/zitetuladag_wawalisepaje_kuxenumo_gidimifukegaji.pdf
    • http://files.silkbodywaxingstudio.com/uploads/1/3/1/4/131438741/5058799.pdf
    • http://files.nadiahgoff.com/uploads/1/3/2/3/132303010/wujunib.pdf
    • http://files.goundoctored.com/uploads/1/3/1/6/131636655/5207962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/fujosuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/55504187920.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/fallout_new_vegas_ultimate_mod.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4495/files/beginner_core_workout.pdf
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/xabutubutujutagaxifimodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/les_vetements_activites.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/39962064493.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/commutative_and_associative_properties_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/43775487563.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/23012186766.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fed.bin
ffcd60cc500756660333644acd521a02cd67f929771c57052a3cc262dcab5428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 5020 bytes
font_01_sfnt_off000080fe.bin
f0d6f89ef67f78e167199e2003459ddaf792fd3fcc8ba47730377a9bf4ecb191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FE 10196 bytes
font_02_sfnt_off0000a3d9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D9 4324 bytes

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