Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0de3f3839a5103…

MALICIOUS

PDF

45.4 KB Created: 2020-08-27 15:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3609c17e92328db2710b332d2e2b3f SHA-1: 8d41adb02465abdb58f59b87fe1b0925cdd69267 SHA-256: 4f0de3f3839a51036fccb579202c626186479ae2b4ca81b190e520c82be637fb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=plantilla+modelo+canvas+excel`. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute content or traffic. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements indicates a likely phishing or redirection attack, aiming to lead the user to malicious infrastructure.

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=plantilla+modelo+canvas+excel
    • http://dewepalox.threeforkshistoricalcenter.com/uploads/1/3/2/8/132814930/4323843.pdf
    • http://pumet.my-lhd.com/uploads/1/3/0/8/130814328/f54d2b7947ed73a.pdf
    • http://files.makeupandtanningbycassie.com/uploads/1/3/0/9/130969370/8ce16ee60.pdf
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdf
    • http://xivuvom.abunashaykh.com/uploads/1/3/1/6/131606000/1661226.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2301/files/91385095983.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/bulexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/rujal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/fapawonekobemijidegoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/46571077640.pdf
    • https://cdn.shopify.com/s/files/1/0435/2429/2762/files/kamus_arab_inggris_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/brave_new_world_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/virumalazesutavune.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/catlogo_hinode_2020_ciclo_3.pdf
    • https://cdn.shopify.com/s/files/1/0465/5366/1590/files/asfixia_libro_alex_mirez.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/zotumavepovuzumexadenijif.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_off0000652f.bin
91f6308ff079ed6d534d8ee55c0c1d8fa228c53eba1276773210aa38460bd761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652F 4908 bytes
font_01_sfnt_off000075ca.bin
5f4d96ae25c57e7502330d08120ff1e42ccd08326469b04d9d20267e5824aaeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CA 11200 bytes
font_02_sfnt_off00009a94.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A94 4324 bytes

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