Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ad1e239bafd0ff…

MALICIOUS

PDF

119.0 KB Created: 2020-08-01 13:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e407a1ab5aa9597739cd30ce98111531 SHA-1: 79ba8278eca9f8acfde966e1f5a8e70b2f9e40e1 SHA-256: 96ad1e239bafd0ffb4018a62d856b070ced9d43164195f726e6b852bcbe4e552
154 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.ru'. This URL is embedded within the document body, which is obfuscated but contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=lalitha+sahasranamam+meaning+in+telugu+pdf
    • http://files.blakkanvas.studio/uploads/1/3/1/3/131381850/zokufepiladod.pdf
    • http://files.truewealthfg.com/uploads/1/3/2/7/132710687/migejowo.pdf
    • http://files.honeybeetreasure.com/uploads/1/3/0/7/130775434/5ea984b04d49f2.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/radezesodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/giwajojevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/88048444858.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/kefijelumipelemuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/pixeloximujarofomizatet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/40975872105.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/duzezeribe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/93183503115.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/negapiluwojowinoxosojali.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/womevonibopubezibematuni.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/36629818415.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c65.bin
3a66c5017c38c946f570c420b741623c4de64751fe45ea90d944f332eef9ed68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C65 5396 bytes
font_01_sfnt_off00014e8f.bin
4707bf859c2b2b552e51fb2091ad8c8f9f3049b019adc279754ac00abd2d80ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8F 2140 bytes
font_02_sfnt_off00015800.bin
7e920e56b2d69ad0a34c795437496448bdbf67ad0deb23e21458005eebd3eae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15800 3740 bytes
font_03_sfnt_off00016375.bin
0e14f26a3b6789d166530b4ec676aa8c09561025e97176d540cede4c1a7a34f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16375 29792 bytes
font_04_sfnt_off0001a375.bin
753f7ba257c99875fd3ca108206d1d045a3b3c82e774ef974eee2640fd1de429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A375 13636 bytes

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