Malicious PDF — malware analysis report

Static analysis result for SHA-256 c102dcdbf8efda55…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 06:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055708066ae30310e04be596cbb87cd1 SHA-1: f7bd39044d94f6d0d04c2ae3b73df5e6f3a4113f SHA-256: c102dcdbf8efda553fffd6cf23186e0ccbda16f14d160268e81257dd4b7c4841
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, a significant portion of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector at https://ttraff.ru/pify?keyword=converter+pdf+para+dwg+gratis+online. The document body also contains this URL, suggesting it's the primary lure. The presence of a 'download button' heuristic further supports the phishing lure.

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=converter+pdf+para+dwg+gratis+online
    • http://files.durhamshowcasefestival.com/uploads/1/3/1/4/131406344/surejoxuvam.pdf
    • http://files.shreyanshjain.net/uploads/1/3/0/7/130739986/fb6d2f8301.pdf
    • http://files.adameccleston.net/uploads/1/3/1/4/131411596/1394e81fcefd8c2.pdf
    • https://cdn.shopify.com/s/files/1/0434/8510/2237/files/graphs_in_access_reports.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/gumifurusak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/70856345438.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/minecraft_1._14._4_apk_award.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/mamuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/alif_novel_episode_8_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5435/6897/files/visadesekulolivuruj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/xirebewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/17948681613.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/identifying_functions_worksheet_8th_grade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058dc.bin
5a4992344cdb569d25d54143e8c68f78eb2c2abcfa62e62caf36aa8166ad30e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x58DC 5172 bytes
font_01_sfnt_off00006a9a.bin
e33a40cd7039fdaa099b16981a66245017544a8b84b36b520aa5192f5e2efe32
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 10044 bytes
font_02_sfnt_off00008d0f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0F 4324 bytes