Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d8f8cec647975f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-09 13:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3bf8df92fc3eafb073f4164c851a46 SHA-1: 655c7ad18677a5ea44c22777bd371776937c37fd SHA-256: c0d8f8cec647975f33286a3af380edfe14a51c403f35bfaa27641b20925af7aa
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document body itself is heavily obfuscated but contains references to the malicious URL and other potentially benign Shopify links. The ML classifier also 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.com/pify?keyword=caries+dental+pdf+articulos
    • http://neroka.womansclubofspringlake.org/uploads/1/3/0/8/130874218/266f4c31d566a1.pdf
    • http://rosidi.pateleby.com/uploads/1/3/1/6/131636725/37913.pdf
    • http://sifigoxa.cyalrebels.com/uploads/1/3/0/7/130775918/08791a8b.pdf
    • http://files.mingusperformingarts.com/uploads/1/3/1/1/131164198/busitoxipeti.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/76148192747.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/morning_cash_hog_prices.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/aadhar_card_form_english.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/kanopig.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/calendario_escolar_2020_honduras.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1846/files/adverb_of_frequency_worksheet_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/14710947635.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/wikilez.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/time_servers_google.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/60905851577.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/sodexuzomutilosekolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/7726167660.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/accredited_universities_in_kenya.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_off00006aec.bin
b64bcb85556b81b2e42216d9761ba5eaf874ac7024388191267eb3892e17c193
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 5052 bytes
font_01_sfnt_off00007c26.bin
b9f2ea41dd8ca63c2a6a15b765f76af32b9c6a2953cbdd3c54b3d347ec63faaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C26 9704 bytes