Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fed5c8743859eb5…

MALICIOUS

PDF

47.3 KB Created: 2020-08-27 14:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f812f7a301177ad219de4dcd7112fe46 SHA-1: a0002fea6f9d2c0716ceff684b6f612af25f182e SHA-256: 3fed5c8743859eb5dad22c5a29036a91c6324f4514329da15ee99eb101350d31
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 18 external links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Dragons world breeding cheats' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier also strongly indicated maliciousness.

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=dragons+world+breeding+cheats
    • http://fizetek.theopentrunkyyc.com/uploads/1/3/0/8/130814168/9012791.pdf
    • http://files.frenchamericanbiotechspringboard.com/uploads/1/3/1/3/131398195/sesilif.pdf
    • http://files.pureelegancesalonandtattoo.com/uploads/1/3/1/4/131408103/waforiroxeda.pdf
    • http://puzege.phisigmapidavis.com/uploads/1/3/1/3/131379730/sujipijelenewurex.pdf
    • http://pazezu.liturgicalartsconference.com/uploads/1/3/1/4/131407469/146a91d56484.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/ibps_clerk_notification_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/rorurudeseboxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/wurujegutero.pdf
    • https://cdn.shopify.com/s/files/1/0463/4666/6146/files/escorts_in_new_zealand.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/rogiwasekowedawor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/github_readme_images.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/lebigejulaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/sopebatomupelisewowole.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/paired_conjunction_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/6703/1200/files/zagumonenotikivijibep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/18100539452.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/vugife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.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_off00006ffa.bin
70b1a5f984516a8b2c30b22e05c8678d78c9748a09b9048ec02270bb231048f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 5432 bytes
font_01_sfnt_off00008278.bin
cc790946605d9f89dadf4efb28354f99e5ebd1132cc4109b8cc8c9c45b1eb013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 14292 bytes

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