Malicious PDF — malware analysis report

Static analysis result for SHA-256 9057cf48ebe633db…

MALICIOUS

PDF

54.1 KB Created: 2020-08-30 14:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a463f0bd3744577398a77b368fedc1 SHA-1: 5f0d7fe3c69c7670f2090ec76e1516bf7bcd8ec3 SHA-256: 9057cf48ebe633dbb45e1e74067875a49001dfc8ced61f3acfb983582a76c04f
150 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 'https://ttraff.ru/wix?keyword=area+of+a+pentagon+with+apothem'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking URLs, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=area+of+a+pentagon+with+apothem
    • https://cdn.shopify.com/s/files/1/0465/3986/6270/files/backwards_design_lesson_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/silverthorne_publications.pdf
    • https://cdn.shopify.com/s/files/1/0437/8470/0055/files/tiwiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/zawanilajorusipos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/95215094606.pdf
    • https://cdn.shopify.com/s/files/1/0440/0224/6814/files/alliance_of_valiant_arms_aeria_games.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/calculus_3_kenyatta_university.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/the_peaceful_pill_handbook_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/sejerepeboduguduli.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/69329630426.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/7077019035.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/nuworigavafabukegi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/pinixawuwunax.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_off00006159.bin
b4b4a43aa6f6d98cade12f53a11bfba7dd38094c398f06975ffa29126ec1f330
pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 3952 bytes
font_01_sfnt_off00006f46.bin
669eba0154699f896b7d41b9963307053215a65b047c2a6f8ec52f2a3a27b924
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 5188 bytes
font_02_sfnt_off000080d5.bin
282c6bf5e19540a84f8f8959e7fba9c17ab48b21764a16f34c3274fbaa42125c
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 12960 bytes
font_03_sfnt_off0000aa54.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA54 16036 bytes
font_04_sfnt_off0000befa.bin
4635fb554d1023a4ae7bbecd6eb836a3a99d7d7f259da17169a70ad3739c544e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFA 2716 bytes