Malicious PDF — malware analysis report

Static analysis result for SHA-256 d879bbcd672f3575…

MALICIOUS

PDF

56.2 KB Created: 2020-08-14 02:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeeeb230e6424c57893acada3d65f26d SHA-1: bd4a845dcc8953e50e5d1c54ea87df027c5531f2 SHA-256: d879bbcd672f35758386147f7cc0e75189f64c22b245efbbb27bccc7247e2608
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, 'https://ttraff.ru/pify?keyword=dolor+nervio+ciatico+tratamiento+pdf', which is flagged as malicious. The document body also contains numerous links to other PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier 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.ru/pify?keyword=dolor+nervio+ciatico+tratamiento+pdf
    • http://files.clarksukuleles.com/uploads/1/3/0/8/130874278/doxazabij_muwasonemabex_netomekiliju.pdf
    • http://files.bcarrollconsulting.com/uploads/1/3/0/7/130740586/3238139.pdf
    • http://files.monstermaniagame.com/uploads/1/3/0/7/130775098/4167422.pdf
    • http://files.thesanctuarycapecod.com/uploads/1/3/1/4/131437513/1d2ecd5e.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/zezokoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/autodwg_to_dwg_converter_2020_crack_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/61348285851.pdf
    • https://cdn.shopify.com/s/files/1/0446/7795/5747/files/a_la_carte_breakfast_menu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/ccna_1_chapter_2_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/99754736530.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/32201201827.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/11272096806.pdf
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/cateter_venoso_periferico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/express_js_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65788935473.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/argumentation_dans_le_discours.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_off00008ea4.bin
4df3ef295ff18c6917df98b74fac0842a529198a1ba7fc9aa8de7d26394d39ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 4968 bytes
font_01_sfnt_off00009f71.bin
87bfeeebd029f795b8c4590cce5e9552ec222e649a0f593191657177299b7bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F71 11600 bytes
font_02_sfnt_off0000c52e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 4324 bytes

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