Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b75844460d8a84…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 20:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 624553a82eb7c299c9c17255aecd6d6b SHA-1: 76c5d052204e4c5a13c9a95353b4c26654a6215b SHA-256: 31b75844460d8a847450b2a6ab1ce44badbdc6e459753b47aa0bd60081c3ecb9
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact payload.

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=welding+metallurgy+and+weldability+of+nickel+base+alloys+pdf
    • http://files.pca-music.com/uploads/1/3/0/7/130739234/wujulasujike-rexilixudofu-napejesovini.pdf
    • http://files.georgeryall.com/uploads/1/3/1/8/131856433/fa123d.pdf
    • http://files.doggonesailingcharters.com/uploads/1/3/0/9/130970015/kitovavo.pdf
    • http://files.yamw.org/uploads/1/3/1/8/131857445/memanodononejo_kojenuxibonis_biwikilefaduwo_xeteru.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/zevisusibizaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/application_of_group_theory_in_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6272/files/sql_database_administrator_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/16402886298.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/approaches_to_psychology_glassman_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/auto_tune_audacity.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/iata_city_code_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/banished_poradnik_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8758/3650/files/tetepogilaxesagevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/32450290406.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/35214837199.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_off0000583d.bin
79ed8bbf4c1e4d42a1e517f72c0b3add8c57a0178619745483e25585c7a3d610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x583D 5888 bytes
font_01_sfnt_off00006c52.bin
92a552bb7b1f58f0b47e566f8cb34c1947ad2adfb488e24923f8a04df0e75c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 10964 bytes

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