Malicious PDF — malware analysis report

Static analysis result for SHA-256 404d99628e1d88bf…

MALICIOUS

PDF

41.2 KB Created: 2020-08-13 23:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dbe978301e756996953baeefd63cdff SHA-1: eb178283d63ade64f02ad46add2d238d57db2d1b SHA-256: 404d99628e1d88bf5ee8699eae3582ab8d80f63b5655e95c91099b16a51c38d5
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination. It also features a large number of SEO-optimized links pointing to various PDF files hosted on Shopify, suggesting a link farm designed to manipulate search engine results. The document body itself contains garbled text but includes the primary malicious URL and several benign-looking URLs, likely part of the SEO strategy.

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=andaman+map+pdf
    • http://files.jchsmediacenter.com/uploads/1/3/1/6/131606537/7858983.pdf
    • http://xopobino.rocheblackbeltacademy.com/uploads/1/3/0/8/130874218/jazibologiwepa.pdf
    • http://files.yestoyouthgala.org/uploads/1/3/0/8/130814717/9439970.pdf
    • http://fewufu.oleriaemporium.com/uploads/1/3/1/4/131407263/bawojagoxumelujewevi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/toveruweladulawolafikip.pdf
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/saddleback_educational_publishing_basic_english_grammar_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0444/1980/9447/files/dynamic_memory_allocation_in_c_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9912/files/rujuziwanuwulelexenil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/81508465150.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/91794342227.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/content_type_text_html_php_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/basic_multivariable_calculus_marsden.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/20482989140.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/81035760057.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/calculus_a_rigorous_first_course_velleman.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/89531176264.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/gogutaxuz.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_off000060b9.bin
670c7eaede6e3ccb7d0569d3ad8d854c7ee6da5570156abb823883e2dbe85db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 4868 bytes
font_01_sfnt_off0000713e.bin
5a28ba08d3c7dae4c5b3823c7587f51b3e534efc01c5a02479a606a23ba33536
pdf-font-stream PDF embedded font (sfnt) at offset 0x713E 12108 bytes