Malicious PDF — malware analysis report

Static analysis result for SHA-256 2474ca264f5ac922…

MALICIOUS

PDF

47.1 KB Created: 2020-08-28 04:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26db7d7a946f3d4453bc9c5ce6b21a9 SHA-1: f2fb373587a7582605ccfb82cc3bf89201a6c5e1 SHA-256: 2474ca264f5ac922e110896baf9558e81cd73edd9af0a8d76044f9f8ee08b016
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=que+es+el+cancer+de+cervix+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=que+es+el+cancer+de+cervix+pdf
    • http://witixagex.beautifullyuniqueinc.org/uploads/1/3/2/3/132303134/waziguzobar.pdf
    • http://puduzut.thecyphersdenradio.com/uploads/1/3/1/0/131071047/situlivemivebagizima.pdf
    • http://datodowiv.owlsmaryleonardchapter.org/uploads/1/3/1/8/131856543/nusamemabore.pdf
    • http://files.bluemontblooms.com/uploads/1/3/1/0/131070604/tezigopinusezus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/67657471989.pdf
    • https://cdn.shopify.com/s/files/1/0435/9487/5039/files/android_17_power_level.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/revazitigeledafexalazegup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/natiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/benowubujuwufavuxukofenev.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/adirondack_chair_plans_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/nonamizemugagovu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/ap_chemistry_calorimetry_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/pufaxifoxom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/javascript_object_size.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/advanced_typescript.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/cervicalcancer.html
    • 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_off00007728.bin
277c2ebef46f8e4a30da1cffe0a139c6f926bafdaaba5af6bb56ec4883578818
pdf-font-stream PDF embedded font (sfnt) at offset 0x7728 5340 bytes
font_01_sfnt_off00008964.bin
28cbe8dd7490b24d3c43fc02dc6f0ada4d3c72cf4b5df6b9edcb8c04e606d2cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8964 11240 bytes