Malicious PDF — malware analysis report

Static analysis result for SHA-256 4538a5944889ad1d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-20 09:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa8bfc8ab3dd8bc93874719229989dfd SHA-1: 73956be9bb0ff985502ebfcbf080789a37ee8be4 SHA-256: 4538a5944889ad1d0ff6db39ae2884e3cbac698d7ff116a1b3ebb7f63499c780
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, indicating a social engineering attempt to drive traffic to potentially harmful sites. The presence of a download button lure further supports this. The primary malicious URL identified is https://ttraff.ru/pify?keyword=free+music+videos+for+mobile+phones, which is linked to known malicious redirector infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=free+music+videos+for+mobile+phones
    • http://files.clearmindpsychiatry.com/uploads/1/3/1/3/131383255/7070463.pdf
    • http://files.suemediaproductions.com/uploads/1/3/1/4/131482959/96ae9ac1.pdf
    • http://files.stephenjewellcreative.com/uploads/1/3/1/4/131438282/523226ff21c4adb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/33872102977.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/fiwepisikopapumapowuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/tratamiento_varices_esofagicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/69279443902.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9814/files/jilevopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/foremupubabixufagevagexur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/rent_agreement_format_pune_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/56337997553.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/guitar_backing_tracks_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/44198293549.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/balu_mama_song.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_off00007e6b.bin
89a5283aee4eb27ac0561765d7b2c67586bc89e52898c4ed4200deb7cd7c52cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 5340 bytes
font_01_sfnt_off00009070.bin
93a8f1b2c9add8d6a3c5a1924f9dc89855fffa6b63a3625a8157e48a1c39be7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9070 10120 bytes

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