Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e5a0fac007dfac…

MALICIOUS

PDF

42.4 KB Created: 2020-08-14 05:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4021a6fcb1a745cfd4f077b4be64442 SHA-1: 3a04d013fe47dbbf6004e8d537a19fd3dbd25ef2 SHA-256: 54e5a0fac007dfac765a86a261df666f6666bb540fd3c665e86721a14b32671c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve as the primary attack vector, redirecting users to potentially harmful sites.

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/wb?keyword=studio%20mumbai%20praxis%20pdf
    • http://xamogu.theworldcouncil.net/uploads/1/3/1/6/131607062/bobonexufadira_lujojozox_kugojoxigibile.pdf
    • http://files.thursdayschildsailing.com/uploads/1/3/1/6/131636807/kulex_tevupixumepig_tigode_pikagamijimitim.pdf
    • http://files.revbmrobison.org/uploads/1/3/0/9/130969656/9579027.pdf
    • http://files.branchlutheranschoolshaiti.org/uploads/1/3/0/7/130776257/monudibigawurap_pubobisokibote_jaxamikutipo_zepatedin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/bopupefogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/jofafugadege.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/37788683996.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/77599053413.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/nimono.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/a_whole_new_world_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/62281251703.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/58924589483.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/surah_yasin_dan_tahlil_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/dibujo_arquitectonico_sena.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/44110752041.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/3583164574.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/66334855666.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/darezufezosigivemexun.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_off00005970.bin
5c72c48d65715fca9352cde2ae03df583b9764e53accff94a199a7fb21c4e772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5124 bytes
font_01_sfnt_off00006ace.bin
37178ee94304e7a16ae86c290774be6c7e9984296335a6e0b0b8f0a38c1b185d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACE 10416 bytes
font_02_sfnt_off00008e62.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E62 4324 bytes

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