Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b6e714d9fd731b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 17:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f5034deff9b97b17b46dbe62ef4fb29 SHA-1: 32fb05ed1e7c0e8fbf1f1fcda36afc791423f329 SHA-256: d8b6e714d9fd731bc8e90a9007a209c504e5ff947278d2ae870a0418f009f365
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to a link farm hosted on cdn.shopify.com. One of the embedded links directs to a known malicious redirector, ttraff.com, which is likely used to deliver a secondary payload. The document body text, though partially corrupted, contains the string 'Gta vice city free aptoide', suggesting a lure to trick users into clicking the malicious links.

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.com/pify?keyword=gta+vice+city+free++aptoide
    • http://files.bradentondentalhealth.com/uploads/1/3/0/9/130969926/furuw_magedulezok_numokixelubifig.pdf
    • http://kifawubo.chrisjohnsphd.net/uploads/1/3/1/3/131383775/8412201.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/bufijakekuwoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/pezexerelilov.pdf
    • https://cdn.shopify.com/s/files/1/0452/2138/0247/files/tonawaxagaguj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/chunk_loader_minecraft_1._14.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/gosojududipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5412/0606/files/93333804351.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/babes_com_password.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6602/files/verbos_auxiliares_en_ingles_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2634/files/86954302176.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/937451985.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0437/5586/4213/files/nevopodi.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_off0000634e.bin
ed5afaf96d018eb4bb380ea117cde2c9997394ac43626ba5beffe765100ab7ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 5132 bytes
font_01_sfnt_off000074e8.bin
7782d1f7343d854f6f4b03188f2fc1e814c6433766644defd1272f0190fd5f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E8 10144 bytes

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