Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df47cbd4f10ef63…

MALICIOUS

PDF

52.7 KB Created: 2020-08-31 00:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca69c33c46b56783f2bcdbf2702e0891 SHA-1: 25d6452ee6bb8ac6ceb2d9da7f2ae7a59178bab6 SHA-256: 9df47cbd4f10ef63cd424bebc91b25c7aa564a97f7f452677fc2ba881f82d1b5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. This URL is likely part of a phishing or malware distribution chain. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but the primary malicious indicator is the redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient for a high-confidence assessment.

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.cc/wix?keyword=padi+dive+table+instructions
    • https://cdn.shopify.com/s/files/1/0435/2658/6527/files/biblia_de_estudio_reina_valera_en.pdf
    • https://cdn.shopify.com/s/files/1/0462/6992/3477/files/secrets_of_western_tantra.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/brandon_grotesque_free_font_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3884/9696/files/zafigajafovi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/tratamiento_para_alopecia_areata.pdf
    • https://cdn.shopify.com/s/files/1/0434/4922/1286/files/cereus_cactus_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/71651695406.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/xifutufexu.pdf
    • https://cdn.shopify.com/s/files/1/0465/0575/4776/files/creating_histogram_worksheets_common_core.pdf
    • https://cdn.shopify.com/s/files/1/0457/7689/6156/files/rurewidejaxoxozusetom.pdf
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/gejexeti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0435/6630/1343/files/bodo_item_song_free.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_off00008253.bin
ed77b8ca28e2ce4b45dfadc2a99a9dc0c7f50d08a9f2948f4a6faa793c9d0cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 5016 bytes
font_01_sfnt_off00009364.bin
e145b698ae1d5d18b68f40df33310f8256b826a0873914f97100ec8a704a1d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9364 10968 bytes
font_02_sfnt_off0000b843.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB843 4324 bytes

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