Malicious PDF — malware analysis report

Static analysis result for SHA-256 15714d026458a32a…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 23:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b36f46c845519c542740a43a1c486e SHA-1: e344914ee730f156c73b82f5e9e51f2e33a8fa3f SHA-256: 15714d026458a32a41c245639bbe9abcba818a9f0bd0d4e3c36ae949a9f8bd2f
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at `https://ttraff.ru/pify?keyword=blender+player+2.+63`. The document body also contains obfuscated text and references to software, likely a lure to encourage clicks on these malicious links. The ML classifier strongly indicates maliciousness, and the presence of a redirector suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=blender+player+2.+63
    • http://files.theatlantadoula.com/uploads/1/3/1/3/131379730/5524822.pdf
    • http://files.sems4acultureoflife.org/uploads/1/3/0/9/130969470/ropumaxin-devika.pdf
    • http://jifemuz.mayonakacats.net/uploads/1/3/0/8/130814788/6fb3ccf.pdf
    • http://files.crownlifeseminars.com/uploads/1/3/2/7/132710669/fizezad-ronux.pdf
    • http://files.serenitycottagelondonontariocanada.com/uploads/1/3/0/8/130813992/0ff871b786918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/33502162716.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/jolumejisis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/96049846160.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/role_of_missionaries_in_the_colonisation_of_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/pedanaxabisiwiliverom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/ace_academy_books_for_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/44695664228.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/lowesinitivagerafuvebeji.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/wiwonixipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/pathfinder_collection_torrent.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_off00006a62.bin
d748f6d00d794bcc6a00cfd0ffb89f33deabc7680a273eb2d0bac9666c578a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A62 5408 bytes
font_01_sfnt_off00007cdb.bin
b9d6763b9f57988657fadfb462e5a15b4b0b4e864241d87b99caf33a8629a174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDB 10544 bytes

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