Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98bbcce1de63116…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 07:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4146feb3bfdad454cbc1a6ecd71ce9f5 SHA-1: 37951d1803be4f373588c22c53b20ae1a6eb7c79 SHA-256: b98bbcce1de63116a14f627af6d61d23022b7d2e6fe77b366b850d4e889f1658
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=bangla+cartoon+thakurmar+jhuli+3gp'. This URL is presented within the document body, disguised by text that appears to be a search query. The PDF also contains a link farm heuristic, indicating a large number of external links, with the primary one being to a Shopify domain. The combination of these factors suggests a phishing or redirection attempt.

Heuristics 3

  • 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.
  • 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=bangla+cartoon+thakurmar+jhuli+3gp
    • http://files.montevistalacrosse.com/uploads/1/3/1/6/131636676/munizim-xawidirer.pdf
    • https://cdn.shopify.com/s/files/1/0454/6310/9790/files/5662796615.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/marathi_kadambari_in_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/86098053993.pdf
    • https://cdn.shopify.com/s/files/1/0449/0860/9703/files/similarities_between_phonetics_and_phonology.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/bhaktamar_stotra_lyrics_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/5439525057.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/706788316.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/rebarekexovofafofefak.pdf
    • https://cdn.shopify.com/s/files/1/0436/3393/4496/files/11160446107.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_off00004671.bin
69868e194eb7858f737d0a3d3fe732db2021e50c3b1ef861edd17029728f8d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4671 5520 bytes
font_01_sfnt_off00005909.bin
94310b09141a379df70d648a28f269cea552db263729d7db29e6869390a612c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5909 6868 bytes
font_02_sfnt_off00006f21.bin
16cf681092761322025e5e2866d717c84cf345dc016c62eb2c2dcfa474d14f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 10276 bytes

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