Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c87eabcabb8027…

MALICIOUS

PDF

45.5 KB Created: 2020-08-03 09:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33784f6e0fa989313b64702f7bd02620 SHA-1: 498da1e5e3c25d077ed7ba0cff3868ef9266bad6 SHA-256: 75c87eabcabb80273507277ba4870998d9cf96cc2b09127b6ca08abc3e9b4f5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to obscure the ultimate destination. One of the primary links leads to a known malicious redirector, ttraff.com, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated but contains the redirector URL and several Shopify URLs, suggesting a phishing or scam attempt.

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=java+string+to+integer
    • http://files.skylynart.com/uploads/1/3/0/9/130969965/07b3b5635.pdf
    • http://files.glabachfarm.com/uploads/1/3/1/3/131383838/lituxid-geribaxejejodaf-tutuboziro.pdf
    • http://files.morethanatourist.net/uploads/1/3/2/6/132681164/zarodufewiz_rinuj_wamujaxajide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/cisco_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/89954240755.pdf
    • https://cdn.shopify.com/s/files/1/0439/0472/9243/files/gudaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/5e_rogue_multiclass.pdf
    • https://cdn.shopify.com/s/files/1/0430/1688/0281/files/manual_air_ride_valves.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9173/files/31343275050.pdf
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/73031517741.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/migow.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/fekolotefafekolotijadanix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/vufurizufisele.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/xewegetije.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/13115291691.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/jufarogewejamonepegubiwim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/rubokebaborosaradoridux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/8645094528.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b22.bin
721626b35c1af106d23bdaf273f697e41357534939baf0ed005bd3cc2cb90d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 4868 bytes
font_01_sfnt_off00007bcc.bin
c41fe9cf91617a9d8d2bb41314cc0ec59a7d87f7a2976543e6b15055afe585ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCC 14320 bytes

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