Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b165fc89b33765…

MALICIOUS

PDF

49.7 KB Created: 2020-08-08 12:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aac544d8016983c440af03285e56144 SHA-1: 4a64302ba0d8beac2d38eda7384affea1ef4e1e0 SHA-256: a1b165fc89b33765e9777c967b8177134e88675c06d531e9c5bca2dc20dd10dd
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 a critical heuristic firing indicating a malicious redirector. The primary URL, https://ttraff.ru/pify?keyword=basics+of+programming+language+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination for users clicking on the links. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious 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=basics+of+programming+language+pdf
    • http://files.galtfarmsgenetics.com/uploads/1/3/1/0/131070711/ninavo_tewadoxebesij.pdf
    • http://files.ritwikdhandhi.com/uploads/1/3/0/9/130969810/gatukukufugifo-tufifagug.pdf
    • http://files.wildlifeinspotlight.com/uploads/1/3/0/7/130739621/403c9.pdf
    • http://files.exitstrategyband.com/uploads/1/3/1/1/131163838/fibujufowadurobop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/16919402192.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/al_ghazali_le_livre_de_l_amour.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/chromatography_methods.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/muvewimadakibofugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9741/files/88685681561.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/koxamagozopikaridatug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/12916432854.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/madden_08_pc_mods.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/c_est_quoi_l_orthophonie.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/bonasukosetamezajeputa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/31334333074.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/42703578470.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_off0000845f.bin
8ffbc72036e44102b2c3a2cb6f463df05849ecfa9b1389ab0cd7162256051f48
pdf-font-stream PDF embedded font (sfnt) at offset 0x845F 5524 bytes
font_01_sfnt_off00009716.bin
d30e89262b4b64d595ab51caceab4ce5f9b3e6c0f0a3219f3ef00585e26015a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9716 10128 bytes