Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a16f9ef150c118e…

MALICIOUS

PDF

32.8 KB Created: 2020-08-30 06:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9092bdfdfacabdf6d102155ebe2645c SHA-1: eaf7700d27925e1b397f1c8b12e7c701c88f4e73 SHA-256: 2a16f9ef150c118e723ddee37a6576cfdd19f8762d0a932fa4f0758912e3c7bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/wix?keyword=hotstar+kasauti+zindagi+ki', which is flagged as malicious. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious content through seemingly legitimate-looking links.

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/wix?keyword=hotstar+kasauti+zindagi+ki
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/positive_character_traits_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/nozosagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/somovikegonofev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/rikesemifisusugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/barunuvijoloname.pdf
    • https://cdn.shopify.com/s/files/1/0459/7304/5415/files/adam_driver_svu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/kiruxizajigevadupitapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/53659453224.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/oligopoly_market_project.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/antichat_hack_android.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ac287dc92f407fb616400383bbedd3.pdf
    • https://static.usrfiles.com/ugd/bb13a2_5678b2e89cd445e6b558e5d7bd264edf.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_7191d0e7f9314e65b80c50f9288cefa6.pdf
    • https://static.usrfiles.com/ugd/739437_72c74afad2594df69e93076284f9d622.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/rpsc_steno_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/rock_paper_scissors_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/hacksaw_ridge_online_free.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004699.bin
2636195e75ae91ed843176c33d459290e8f4170404a35ed157ed0449ad0c2940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4699 5036 bytes
font_01_sfnt_off000057c8.bin
b647a517b0d67ebaf8a9cfe68a818656802d27fa70e0d38bed94ecf5f5a40340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C8 8940 bytes

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