Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fb0fbbb04c9f29…

MALICIOUS

PDF

59.9 KB Created: 2020-08-13 03:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b68862d40b3ee81f1c09adbad3915b4 SHA-1: 9dae377d9b0e5eb5e38d8a450f5ef9f5ac519f17 SHA-256: c6fb0fbbb04c9f29ad4991dca4eeaa9b70e5ad123106c3e9c803dcd23b0f96b8
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The ML classifier strongly indicated maliciousness. The document body contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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/wb?keyword=tcpdf%20multicell%20no%20line%20break
    • http://jevipig.lakerentertainment.com/uploads/1/3/1/6/131637136/9189560.pdf
    • http://files.wantonrambling.com/uploads/1/3/2/6/132683484/buruxexatazisi-xumugutamu-lunine.pdf
    • http://files.thexstart.com/uploads/1/3/0/7/130776499/5403235.pdf
    • http://biluri.oulalosangeles.com/uploads/1/3/2/8/132814930/ruzidegulibuxejozuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/python_true_false.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1822/files/libro_el_aprendiz_de_brujo_2_pnl.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/tebejepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/cashflow_101_game_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/60374548784.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/13136318442.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/trauma_abdominal_atls.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/ribor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7702/5446/files/dupatir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1861/files/42593547167.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/43378803924.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f19.bin
192dc965e00d909fa79c6384ab678ecf53a272d06b921cdd428d8507c755524f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 5156 bytes
font_01_sfnt_off00008070.bin
19108b3e499fa3ce1e68a8a5c0189495f6cd2bfa10896d7363a841d9223e7f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 10968 bytes
font_02_sfnt_off00009f53.bin
1d6ed98a4b7806a81f6cdf44e36d564ffad29de4d8eec49e5545b00cb6ff1e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F53 16940 bytes
font_03_sfnt_off0000d3fb.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FB 4324 bytes

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