Malicious PDF — malware analysis report

Static analysis result for SHA-256 def604cf6a1d7053…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 05:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21aaf4c76ff747ca533feaba552b14d5 SHA-1: 7caf986591ff56bc4eb1cd75622fd01781f011ad SHA-256: def604cf6a1d7053f63e428d1953eb962e8e8dbc4d62ee6c12d3d4755b69c448
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=congratulation+card+template+word'. The document body also contains this URL and references a 'congratulation card template word', suggesting a social engineering lure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links to external PDFs, some of which are hosted on Shopify. The primary malicious URL is the most critical IOC.

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.cc/pify?keyword=congratulation+card+template+word
    • http://files.hirechase.com/uploads/1/3/0/7/130739144/nowelunalibobelixupe.pdf
    • http://files.christichapman.org/uploads/1/3/1/4/131406606/92aec43.pdf
    • http://files.lesleygilesart.com/uploads/1/3/2/8/132815882/nirizisazilasegovi.pdf
    • http://files.kelleyintegrity.com/uploads/1/3/0/9/130970003/84a094c03d979a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/problem_solving_techniques_in_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/fubewepusesadumijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/tojadizowas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/el_bautismo_del_espiritu_santo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/82442438787.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/34162861270.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/nimupurakisirapowatus.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/xigafuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/45937190568.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/bsc_nursing_2nd_year_syllabus_bfuhs.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/wajizerujobanefovero.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_off00006224.bin
1be78e2a0ee5c0af606d882b2a6f5f0bbdbee386dbeb9e3ed3d1e555ece34801
pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 5212 bytes
font_01_sfnt_off000073ce.bin
dc8c305bba6c1a927478474cbd36f1aec36f879c1540c791d6e2d21c90f062e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 9996 bytes