Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44ce3224319f815…

MALICIOUS

PDF

49.8 KB Created: 2020-08-30 09:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04869e19a42f7e7eddb9c530c729035 SHA-1: beac18fca51f1c1ff041a1d6b6287664acd3a765 SHA-256: a44ce3224319f8154f84d3bc2e53e67f6fddd7cc025cd01a4344cf7af8295631
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the URL 'https://ttraff.com/wix?keyword=betimsel+istatistik+nedir+pdf', reinforcing the malicious redirector finding.

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/wix?keyword=betimsel+istatistik+nedir+pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/39599216384.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/xuritaseluxujafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/gemidek.pdf
    • https://cdn.shopify.com/s/files/1/0465/0965/4174/files/tagutudotige.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/c3_96nder_kalo_c4_9elu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1452/7908/files/21251933486.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/24489803798.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/lazexutatavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/modern_calligraphy_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/52471333030.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ec1a1d830b44764a98a65e00688bf9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a181f8b601a3464ba56d0a95cf35dc29.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_off0000807a.bin
e839ca609be54c1bcfb729c28492679c6d34d504470ee8b496b14f5a52d63d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 5300 bytes
font_01_sfnt_off0000926a.bin
6b0d6ae78a5d5030ce64ea97ca29cd6a754ee53a0cd48bed88f4fda498987559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926A 12340 bytes

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