Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf776bd04004e31…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 15:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0358efcb95b55923e0e0575bdbc92a1e SHA-1: 6e1263a21e464c79ee1efcf18574caba32eb6cd7 SHA-256: dbf776bd04004e3175d2e247c5beff2d6c60775870d262bb8e958d59949ec7f0
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a PDF redirector link to ttraff.cc, which is known malicious infrastructure. The document body also contains the URL https://ttraff.cc/pify?keyword=ielts+essay+samples+band+9+pdf+download, suggesting a lure for IELTS essay samples to redirect users to malicious content.

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=ielts+essay+samples+band+9+pdf+download
    • http://files.suzanneboutiquecobham.com/uploads/1/3/1/0/131070633/495740ab.pdf
    • http://mijuki.junc2funkt.com/uploads/1/3/1/4/131412032/vuzowuv.pdf
    • http://fikepoxiz.crkeenwoodworking.com/uploads/1/3/0/8/130874197/8594062.pdf
    • http://files.bartlettandgoldgallery.co.nz/uploads/1/3/2/8/132814593/tipofa-zorugakasodam-zovilewoluxido.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/matricom_controller_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/51795777209.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/watch_the_wire_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/wodanofefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/22596051337.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/deroweritozukuzaxekogax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/bipapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/exploring_public_relations_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/plasma_cutter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/fajisazigokupuxubarivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6587/5359/files/interview_techniques_in_journalism.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_off00006f26.bin
d8481bae2dcff3e56ccfc98debd7aa7c2ff0b0e1df86c42227e9ae415e2b77f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 5516 bytes
font_01_sfnt_off000081e6.bin
efdc7d837a45e6d1881b13b077c5d6ad3438a0a875dc2a86538205885f2ab65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 10548 bytes