Malicious PDF — malware analysis report

Static analysis result for SHA-256 b858817ed4200e00…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 07:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb53ff2c4b65e22f7c7eb4d8ab70b45 SHA-1: 3a5695885e71826bf31c631b17b1020f83c08ca4 SHA-256: b858817ed4200e0031ac463c54e174e473eaa260b5190cc130185800df910562
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=blessed+be+the+tie+that+binds+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=blessed+be+the+tie+that+binds+pdf
    • http://files.oxfordmomsandtots.com/uploads/1/3/0/7/130739883/24b0f7.pdf
    • http://files.mattiacazzola.com/uploads/1/3/1/1/131164573/madumajikopufikesif.pdf
    • http://files.initiatives.com.hk/uploads/1/3/0/8/130813643/a34612a550c231e.pdf
    • http://files.markdalenazarenechurch.com/uploads/1/3/1/6/131606984/923a00428c23.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8790/files/add_png_image_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/xanegiwomerures.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/20158333566.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/chiro_9000_natural_form_mattress.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/change_table_name_sql.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/calcium_alginate_beads.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/los_doce_economistas_mas_importantes_de_la_historia.pdf
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/sekokubuvenitiwov.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/vomuxajasinekabelakododo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/34946266364.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_off00007558.bin
9eaef77b46810f43652586b22d602acb056a28273c4b935c65b3265b5c9643cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 4900 bytes
font_01_sfnt_off000085ea.bin
537a93e8c037b1a51df39de7576823216a1f385703cdd5b63bb6c0e07d203cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EA 10612 bytes
font_02_sfnt_off0000a9bf.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BF 4324 bytes

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