Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5254101922d983c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-09 10:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afaea7e6bb5bc340f05851e0d103e674 SHA-1: 45744a5e5ba1b39fe1790ce1736822bedf25f3b2 SHA-256: c5254101922d983cd72dc55a71a03373d7626b665331bd104502b3de7075be4b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented in the document body, disguised as a link to a food quality evaluation PDF. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive document, leading to a malicious redirect.

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.com/pify?keyword=sensory+evaluation+of+food+quality+pdf
    • http://files.jamesonbrown.com/uploads/1/3/1/4/131438453/jejezadomoko.pdf
    • http://files.ivorytreeweddings.com/uploads/1/3/1/3/131380845/3411414.pdf
    • http://files.ovsassociation.com/uploads/1/3/0/8/130813796/jigoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/sintron_amann_girrbach_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2194/3463/files/napa_battery_charger_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/pokemon_white_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/nudipugijetizukud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/how_to_change_to_word_document_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/65230128835.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/autosomal_recessive_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/cleric_spells_p99.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/free_medical_books_download_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/ejercicios_mediatriz_y_bisectriz_5o_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/rafebenixupajugirobolalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/liste_des_aliments_sans_gluten.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/86_nissan_pickup.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_off00006995.bin
141d931b0507be57d97df113b77bab6414fcfc03cd1e6f3719812fe5557632ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 5428 bytes
font_01_sfnt_off00007c21.bin
028100c66d694da768693b57ce28d6e370ab2c5be9986a904bb5456ed85993e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 9876 bytes