Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c3e1b829c27803…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 09:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e7168dedf557b3791c8c445c7563d8 SHA-1: f70b28e683aab2c5db7eff8b5f029f7926943a03 SHA-256: c8c3e1b829c27803b3e4d06ff5f2f420f6cdf81522e080a3fe528f22e94c5d95
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, ttraff.cc. This domain is used to serve a lure related to 'la campanella franz liszt sheet music', likely to entice users to click. The PDF also contains a large number of links to other PDFs hosted on Shopify, which is characteristic of SEO link farm techniques used to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=la+campanella+franz+liszt+sheet+music
    • http://files.socialarthaus.com/uploads/1/3/1/4/131438059/ximej_kipupi.pdf
    • http://fivugugu.angelaherbert-hodges.com/uploads/1/3/2/7/132740763/1775cf58f.pdf
    • http://sigeguku.mayaminocha.com/uploads/1/3/1/6/131606758/0ef062329.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/gifirutuvowutikosima.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/amar_chitra_katha_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0838/files/convert_png_to_svg_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/4health_performance_dog_food.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/schumpeter_capitalismo_socialismo_e_democracia.pdf
    • https://cdn.shopify.com/s/files/1/0434/9958/5696/files/pdf_auditing_and_assurance.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/sigazesexanomave.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/lodiwatamolufagebuveja.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/94357942116.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/nupesavekuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/52171221984.pdf
    • https://cdn.shopify.com/s/files/1/0465/1991/0558/files/queen_size_bed_sheet_in_meters.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_off000049b8.bin
6d221cffdbdb8a0b39c19791365ba893103374e4e22b5ce9b2be91f5a693f2a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x49B8 5248 bytes
font_01_sfnt_off00005b71.bin
d01d1c984a8b15050447dc9c0e80e59dfb55987758bd40aa37acd706d51fc6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B71 11148 bytes
font_02_sfnt_off000081b9.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 16120 bytes