Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0c931f5e41690c…

MALICIOUS

PDF

59.1 KB Created: 2020-08-24 16:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6de535176113fc7cd127c3ef464e2b1 SHA-1: 10c494df305bd81af1fed7c5b11d0d0b9d776b95 SHA-256: 5a0c931f5e41690c7b978171015718f4445548e8125e4006ac4f5b38120dc5af
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ben+ten+cartoon+movie
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdf
    • http://nemivofi.momentcapture.net/uploads/1/3/1/8/131857445/jexobanaw-fulet-kipilijimireg.pdf
    • http://files.succeed2serve.com/uploads/1/3/0/7/130739379/xesexemepolepurod.pdf
    • http://files.cynthiabjorn.com/uploads/1/3/1/6/131606027/930971.pdf
    • http://files.entertainmentforkidsparties.com/uploads/1/3/1/4/131437987/536d246bc5a.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/borderlands_the_pre_sequel_athena_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/action_plan_steps.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/zitiwofidatib.pdf
    • https://cdn.shopify.com/s/files/1/0462/8699/5616/files/autothermal_reforming_process_flow_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/bk_precision_lcr_meter_878b_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/retinoblastoma_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0445/6457/8463/files/esl_adjectives_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/buzomopazasogagobujipelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/21315431265.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_off0000ab7a.bin
1d9ed62ea06d425818e267bf9d2ac7ffe57314f8559e32754d70bad14ce5bd55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7A 4844 bytes
font_01_sfnt_off0000bbdf.bin
2c461ad1a806801e3b9a28a907b6cdaaf3f1061fb1c1ed55ee996ecbd569b5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDF 10504 bytes

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