Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c00bf1904347671…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 00:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d14be0d0c3b14a9eb0643e697bef0f3 SHA-1: dff478c34192d1a4e8ae9e08fac1bab7378a179c SHA-256: 8c00bf19043476710e85b20ac215a171769e74f47bd5e45c4612c523211752a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=distributive+politics+spreadsheet'. Additionally, it exhibits a PDF link farm behavior with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to distribute malicious content or engage in SEO poisoning. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of malicious links indicates a likely phishing or malware delivery attempt.

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.com/pify?keyword=distributive+politics+spreadsheet
    • http://waloj.pvrr.org/uploads/1/3/1/4/131483036/watudavututuxeluda.pdf
    • http://mebetajim.bluethunderbirdwoman.com/uploads/1/3/0/7/130739892/ruwetezare.pdf
    • http://files.saddlebrookstables.com/uploads/1/3/1/4/131409017/worar.pdf
    • http://files.x4edu.com/uploads/1/3/1/3/131381976/9094827.pdf
    • http://files.littlepaperslipper.com/uploads/1/3/1/4/131405977/5359300.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/ruvuzezexubavemetubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/nutadonogevegubobinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/badland_2_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/sopotak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/bulufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6152/7206/files/journal_psoriasis_vulgaris.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/cambio_climtico_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/13100233127.pdf
    • https://cdn.shopify.com/s/files/1/0450/3791/2214/files/perujoranexevogez.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/download_al_quran_standar_indonesia.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_off00007156.bin
f86a88b920b6d1319875581bf3d7695328e5247fa42cef20eb715a43af81dff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7156 5136 bytes
font_01_sfnt_off000082d8.bin
28fd649d816569d861c0672dd1a8b6ca67d510e69c3e28dd5e7871351dba69a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 9960 bytes
font_02_sfnt_off0000a4f1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F1 4324 bytes

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