Malicious PDF — malware analysis report

Static analysis result for SHA-256 e009e5b326f74c9a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 18:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c910d1fa270d7e6884d4a6a718bf60 SHA-1: b82698c81d375f6fc818f9bbe1580929b434b0c9 SHA-256: e009e5b326f74c9aac86889dd7ab34bef222f92389933a49e75b8716c0ed5cfd
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a primary malicious URL, https://ttraff.ru/pify?keyword=rukmini+babu+baruah+new+song, and numerous other links hosted on cdn.shopify.com, suggesting a tactic to distribute malicious content or engage in SEO spam. No scripts were extracted, limiting the analysis to the document's linking structure.

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.ru/pify?keyword=rukmini+babu+baruah+new+song
    • https://cdn.shopify.com/s/files/1/0449/7352/3112/files/bejisajilixawifadeveke.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/37498071032.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/nemapalejebikimanupid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/scientific_calculator_apk_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/55423169318.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/jurassic_park_game.pdf
    • https://cdn.shopify.com/s/files/1/0461/5084/4579/files/lipid_profile_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0449/1811/2423/files/disbelief_papyrus_piano.pdf
    • https://static.usrfiles.com/ugd/353d00_41994689d01a4e799bbb512598707779.pdf
    • https://static.usrfiles.com/ugd/b8c837_02dd6ffa13a441a082f6696bee891411.pdf
    • https://static.usrfiles.com/ugd/2c7c49_26ab1b84f7af4d8daa7c6334af4b8d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_157440d2edae43d6b7bdffdd7c5d561d.pdf
    • https://static.usrfiles.com/ugd/b65acf_bfb4cdf9e365448b956f3affd8f3fa6e.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/59473347809.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/what_is_chiari_malformation_type_1._5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca2.bin
b746fb6d352b5135481f86bfd8e3f2e70c044bb6492e616bdca0e12a468ce7dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA2 5368 bytes
font_01_sfnt_off00005ed0.bin
6737da32be00896227cab3c1519470e987d0c5c0127b429949d54bddbc533249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 4460 bytes
font_02_sfnt_off00006d38.bin
1870539d6cfb5cb3111416d6e1354b8db9c455a452da6bd0cb27e72fdc200309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 13672 bytes

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