Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a408604e652354…

MALICIOUS

PDF

37.4 KB Created: 2020-09-05 08:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9a3e05513e8fb978e628c2c3d07aeb8 SHA-1: 24aa5ae753e4e7bcdef416b9bf12eb9c526faa59 SHA-256: 68a408604e65235411897dc3eb5f58889bade4ed4d242a9ea035732d60e5a792
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to PDF files hosted on Shopify, which is indicative of a link farm or SEO poisoning attempt. One of the primary links, 'https://ttraff.club/wix?keyword=3d+live+wallpaper+abstract', is flagged as a malicious redirector. 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.club/wix?keyword=3d+live+wallpaper+abstract
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1783/7480/files/speech_pathology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/88635861185.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/bifafidodoxosadir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/3d_shooting_java_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/relutunefoxumuno.pdf
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/malayalam_bible_kjv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/73883796141.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6d4c94572a0d4860abbf00134f27bbca.pdf
    • https://static.usrfiles.com/ugd/44b221_d41fb08b6e484a699965f68f7c7ac513.pdf
    • https://static.usrfiles.com/ugd/c1c462_d6d7e16c7f8142ad8dfd94cc64db6ad0.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_off0000536e.bin
47838510b59a7829bd44c011d2904e6747171d1bff5e84f0d5ff1a16550f312e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536E 5428 bytes
font_01_sfnt_off000065ff.bin
88ab707344fa79ec2297fc4626df5f914b117767f53e79109f7903c1b2b0f58c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 10344 bytes

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