Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5bd3b6f4eaad69…

MALICIOUS

PDF

44.7 KB Created: 2020-08-30 19:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b636056baeb40b65974bffa389f1bf5 SHA-1: 81d39bda159339704921d6cda6b21a95bd969658 SHA-256: 7a5bd3b6f4eaad699a9ef012c2f2e3b09245fcd1d7e0dcef77aa78f8abd08b3a
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy, likely to improve search engine ranking for malicious content. No scripts were extracted, and the PDF structure itself does not reveal further malicious intent beyond the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=campo+formativo+matematicas+primaria
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/tv_broadcasting_technology.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/lutivafenuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/need_for_speed_carbon_pc_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/sutotafareseni.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/mercruiser_alpha_one_gen_1_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/bg_voz_informacije_kontakt.pdf
    • https://static.usrfiles.com/ugd/0df15e_186a880042254f91a2c3ba0417941736.pdf
    • https://static.usrfiles.com/ugd/07ef24_547df3713b274c3d8be99abd09629080.pdf
    • https://static.usrfiles.com/ugd/7d21c0_bdc41afdd39d45ccbf98ffe0562e9b52.pdf
    • https://static.usrfiles.com/ugd/ae15ca_8812bb8b89504b88b16a2dfb9287cd79.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/30036921715.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/50930801431.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/foxpdf_coreldraw_cdr_to_converter_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/relumesuseru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006528.bin
69429acd0e979ba0080d50509f5643d1cc01e3361260c5986217c276d22513f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 4892 bytes
font_01_sfnt_off000075d6.bin
df44e436943d5197fae5d13f8f28c8504ae2e6324cc0bacab8a9b34365714634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 9980 bytes
font_02_sfnt_off000097e5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E5 4324 bytes

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