Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cebf0964dd62d9d…

MALICIOUS

PDF

52.2 KB Created: 2020-08-12 22:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffdc388a67f75ac3432f5964d2979b4a SHA-1: c8feffea4f520a1f3dbeeecf39c8a8cfba04ddef SHA-256: 4cebf0964dd62d9d351e5b0cf4c6c1ced3c7c59b09475f0d6a1a8c63da696083
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector and others forming a link farm. The primary malicious link is https://ttraff.ru/wb?keyword=html%20server%20controls%20in%20asp.net%20pdf, which likely leads to further malicious content. The presence of numerous links, many hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute malware through a large network of seemingly benign documents.

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/wb?keyword=html%20server%20controls%20in%20asp.net%20pdf
    • http://files.nicholasalfredo.com/uploads/1/3/1/4/131438539/9987337.pdf
    • http://files.cyber-cy.com/uploads/1/3/0/8/130814297/zitaxawoga.pdf
    • http://mafural.womenmakingascene.com/uploads/1/3/1/8/131871390/321292.pdf
    • http://waboze.mtmacedondawnservice.org/uploads/1/3/0/7/130776485/4038846.pdf
    • http://files.windstonehoa.org/uploads/1/3/1/4/131406449/2323204.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/fazugamulazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/rarox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/69365373989.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/arabic_french_bilingual_visual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/text_abbreviation_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/1486985005.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/busixokutijebifobuvef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/assets_and_liabilities_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/lupanibulurudurujisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/62807594431.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/asignaturas_psicologia_uned.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/the_amory_wars_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/ratogemadefejosagofuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/60550571189.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000746c.bin
6933c89e758b6d8e0b1eb0131ec8150bbeedba9f093da10f64009ee9119299cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x746C 5352 bytes
font_01_sfnt_off00008687.bin
85bbaa072a718d8afd8a20a0732bb0c6367e8ae107e5e7f9b659c76c5868c1cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 26248 bytes