Malicious PDF — malware analysis report

Static analysis result for SHA-256 29389ebe8335dce9…

MALICIOUS

PDF

52.7 KB Created: 2020-07-29 21:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d157b6fef7b58fd4797bdce955178a2e SHA-1: e0b5e6cd5956550baeffb4ce6387e8283c97c5cf SHA-256: 29389ebe8335dce9c38996d59827d155300d3267e72bf10005557d99da0b11f6
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded URLs. One URL points to a known malicious redirector infrastructure (ttraff.com), and many others form a link farm hosted on Shopify and other domains. This suggests the primary purpose is to direct users to potentially malicious or SEO-abused content.

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/pify?keyword=blasonario+de+la+consanguinidad+ib%25C3%25A9rica+pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.facememakeup.com/uploads/1/3/0/7/130775897/pinefazawa.pdf
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdf
    • http://files.gatewayreadingcouncil.org/uploads/1/3/0/8/130814605/ece4718b7.pdf
    • http://files.reimaginingourwestmoreland.org/uploads/1/3/0/8/130874050/rejadiruw_faxuxezuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/loxixurulitabab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/37399248847.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/bifuxir.pdf
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/67115448208.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/16884146312.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/15242524862.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/49490448885.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/49569360627.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/nabutovibaxunakazejij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6173/8662/files/rakimewil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/bobosawopazepavevafekug.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/japikajarubivibuwejosize.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.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_off00008c59.bin
73f20d4c8636f7273ad09e82f3b8b7a5a3792c2a2422673dac567586611f8f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 5456 bytes
font_01_sfnt_off00009e9f.bin
244135be4122c003fb70579329fe76fc119442585873e28b75e8f16fd17eb8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9F 11240 bytes

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