Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0cf940b01c1a21…

MALICIOUS

PDF

74.4 KB Created: 2020-08-15 07:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47d5fa63ee6a3319f177c992d6e2e8f SHA-1: 8395cd77474321285827719810f28130f68403fc SHA-256: cc0cf940b01c1a21a15678eb05325ba4f5e795a26279125bdf339caea995ee1f
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, https://ttraff.ru/wb?keyword=aoristo%20greco%20pdf, points to known malicious redirector infrastructure. The majority of the embedded links are part of a link farm hosted on Shopify, likely for SEO manipulation. No scripts were extracted, and the document body was largely unreadable binary data.

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/wb?keyword=aoristo%20greco%20pdf
    • http://files.shadedlily.com/uploads/1/3/1/3/131384113/pakifu-ginipafigopu.pdf
    • http://files.chasemichaelmusic.com/uploads/1/3/1/8/131857315/ravetobubuni.pdf
    • http://buninolof.mariogovorchin.com/uploads/1/3/2/8/132814930/4086c.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/aachen_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/pilumigagiwedawurawax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/88285322012.pdf
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/60216991221.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/rovezisusasewolevudap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/32418934847.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/methods_for_the_diagnosis_of_bacterial_diseases_of_plants.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4664/7446/files/cbse_class_10_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/81239837525.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/alberta_hunter_education_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/zovuxosevotaninu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/c_string_contains.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6c7.bin
7893669d535473b56bacde28e1cd9b385ecafb8f75545d23a79e8d5ce3198d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C7 4752 bytes
font_01_sfnt_off0000b70b.bin
e64ff7e059cc9a05fd6992ebf5a6514b46a5a46151a831b99a2be659aa0dea46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB70B 25528 bytes
font_02_sfnt_off0000f7b9.bin
cc47f81d6cabe9e99aa8bd947eb46870b0f65f2471b50c305b220fdabbe06a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 16164 bytes
font_03_sfnt_off00010cdf.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 4324 bytes

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