Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccd16da15eca357…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 00:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437d99e26e29f480fc9c1c36a5b59457 SHA-1: 69a0454226cd597d1890bdca7c0dc7565cbaa80a SHA-256: bccd16da15eca357c7b42fbfdaf751e81d69e67dbc51c02884f0c346bc3de1f9
128 Risk Score

Malware Insights

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

The PDF file contains a lure for 'phoneme segmentation worksheets free' which is intended to trick the user into clicking a link. This link, https://ttraff.ru/pify?keyword=phoneme+segmentation+worksheets+free, is identified as a malicious redirector. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirection via the embedded link.

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=phoneme+segmentation+worksheets+free
    • http://files.borlandclinic.org/uploads/1/3/0/9/130969809/543765.pdf
    • http://files.swisskonig.net/uploads/1/3/1/0/131070151/fcfa89c6b4.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/3715209745.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/move_it_like_bernie.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/pakusuweg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/97526677975.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/metro_bathroom_fittings_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/17235926198.pdf
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/mipepafo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/ecological_footprint_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/exception_handling_in_java_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7320/7446/files/playing_card_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/31700065369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/84837587060.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_off000061a3.bin
d433373acf0d28c9ba1f6afcd64916f175409ca513cc300695faa2cbf89570ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 5304 bytes
font_01_sfnt_off00007390.bin
cb274b0956ec645d60dbf41f825926be01f8248da1229853395caa15ae9f5dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 10180 bytes