Malicious PDF — malware analysis report

Static analysis result for SHA-256 4841743721fc8fdc…

MALICIOUS

PDF

44.8 KB Created: 2020-08-07 18:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8358db6891da35a9dab1094d85c3d472 SHA-1: d8f535a9a7b894c6239fd3f4c71ba9df4b7b3e6e SHA-256: 4841743721fc8fdcc4e4a6f3ad63c4475432eb42a7d1d48794a78927b3547b6a
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to oat health benefits. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious intent appears to be redirecting the user to a harmful site via the ttraff.cc URL.

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.cc/pify?keyword=avena+beneficios+para+la+salud+pdf
    • http://files.petstylingbysarah.com/uploads/1/3/0/8/130874588/goposalakotefokisot.pdf
    • http://files.msdiglobal.com/uploads/1/3/0/7/130739503/7039829.pdf
    • http://files.ukirkstl.org/uploads/1/3/1/6/131606059/faxar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/cable_rope_overhead_triceps_extension.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/fundations_level_k_teacher_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/xewetebupikitapirir.pdf
    • https://cdn.shopify.com/s/files/1/0441/0294/2872/files/abecedario_en_ingles_escritura_y_pronunciacion.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/82163394363.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/puisi_candra_malik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/2003_chevy_trailblazer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/loraine_boettner_roman_catholicism.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/fedamaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/98678139747.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/65388744173.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/cancer_immunology_and_immunotherapy.pdf
    • https://cdn.shopify.com/s/files/1/0434/5846/1863/files/brother_sewing_machine_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/business_communication_essentials_bovee.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_off0000718e.bin
4b585b7b1e4e67590ca2bc6cd3f25f3f0c2d1c7a621b81f82c224f86ac0a3556
pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 5340 bytes
font_01_sfnt_off000083c9.bin
afdd54ffbd3eb2f96e22eaa31634ede3f87fca2749fff43a54e4d4c0ed273873
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 10536 bytes