Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acb252a990b8435…

MALICIOUS

PDF

46.6 KB Created: 2020-08-21 16:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be52805885d97c980f4418d34aa9786c SHA-1: 6a32a0fd41332c6f32b8f7efa6fbd09eb0e187f1 SHA-256: 9acb252a990b843596f7a1a7f8ae50b027ba163feff6858d0f89338a986e1fd6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=viber+for+samsung+android'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. 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=viber+for+samsung+android
    • http://files.indianagolfsolutions.com/uploads/1/3/0/8/130874067/lomipesun.pdf
    • http://files.empowerlovenow.com/uploads/1/3/1/4/131438474/bututorapojaforen.pdf
    • http://files.attorneydianebaker.com/uploads/1/3/0/9/130970014/3599882.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/wutupabubazilavuzoluvo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/85422786153.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/39975830167.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/runescape_max_hit_calc.pdf
    • https://cdn.shopify.com/s/files/1/0439/9982/1982/files/iterate_through_list_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/bonanza_g36_poh.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/jigotagisutibujulidivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/23860387119.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/43381715455.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_off00006719.bin
50759c40df67ec181331d37bc16259f4db20c39507a2c7d18444f96545433770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 6424 bytes
font_01_sfnt_off000076f9.bin
50f06a080f843117afa684133c0bdc09614ac27afb7ed241d8479b37d9a794a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 5300 bytes
font_02_sfnt_off000088e8.bin
d454bfe92afe79f6093ef762fe0824f8b7c4df7ba9fb922457aca4a8734db97c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E8 10856 bytes

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