Malicious PDF — malware analysis report

Static analysis result for SHA-256 2104a6fe0e8b4f60…

MALICIOUS

PDF

51.8 KB Created: 2020-08-07 05:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fff95927a50eeae6aadcf9dac2023471 SHA-1: bed00e3186402358fc141f3ae6ad3c7272ccf9ee SHA-256: 2104a6fe0e8b4f6058cd6705c54d00e2d21c7bc322b214753d63d16af1b28431
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to system analysis and design tutorials, suggesting a lure for free downloads. The primary malicious link redirects to 'ttraff.ru', which is flagged as a malicious redirector. The presence of numerous shopify.com links indicates a link farm technique.

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=system+analysis+and+design+tutorial+pdf+free+download
    • http://files.beachcitiesrockclub.com/uploads/1/3/1/6/131606789/sogefubinudavud-numafukoradidot-kubepigifagobu-dovopevudobex.pdf
    • http://files.ozheating.com/uploads/1/3/0/8/130874246/4825124.pdf
    • http://files.eminusk.com/uploads/1/3/1/3/131398176/tofuw-ludigojenerujus-witasuvoloxad.pdf
    • http://files.bali-jaladara.org/uploads/1/3/0/7/130739456/vuzaru.pdf
    • http://files.techbyjeni.com/uploads/1/3/2/6/132680784/3329500.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/case_files_neurology_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/diwubotikema.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/79535485703.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6081/files/9475438153.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/40544538936.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/pdf_file_editor_free_download_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/danonazuneg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/86980565636.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/all_types_of_camera_shots.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/nominuzakutikavuwip.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/java_radix_sort.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/duwuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/tutixetuwoxizilosiw.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c12.bin
39781d279d78b8218825148440ee459a0e38097acf198a9b9c571159d73a9084
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C12 5656 bytes
font_01_sfnt_off00009f50.bin
8fb998f7e01aba4706f0a10fd9abca72df780fe2bf514b4774ba3f92b7b2d1de
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F50 10208 bytes