Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e604f9363553cdf…

MALICIOUS

PDF

44.2 KB Created: 2020-08-05 05:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c6e6740d43f358a329d7e183dc02989 SHA-1: ffe84973cf6660a5a48eb0b50a2cae1a90b67a66 SHA-256: 2e604f9363553cdfda779c9cebed1eff27f227f3995c61ca2285f9894ce2a888
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, pointing to 'https://ttraff.cc/pify?keyword=fundamentals+of+metal+cutting+and+machine+tools+pdf+free+download'. This URL is presented within the document body, disguised as a free download for a technical document. The presence of a large number of external links, many hosted on Shopify, suggests a link farm designed to improve SEO 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.cc/pify?keyword=fundamentals+of+metal+cutting+and+machine+tools+pdf+free+download
    • http://files.specialdayllc.com/uploads/1/3/1/3/131383743/8d3cfecd.pdf
    • http://files.mosaiclodge176.ca/uploads/1/3/1/3/131398547/botolaxer-fegatelaxoparut-daworu-xuzufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/97135439401.pdf
    • https://cdn.shopify.com/s/files/1/0437/7300/1877/files/lemegilita.pdf
    • https://cdn.shopify.com/s/files/1/0437/5193/2056/files/31817387915.pdf
    • http://files.armen.people.ua.edu/uploads/1/3/0/8/130814052/f08af2562.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gepinukozolaxuximomuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/ncaa_football_12_rosters.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/96287470137.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/38095851766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/63239118135.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6732/files/sulidemobukajokebuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9642/5119/files/44248656324.pdf
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/jizeduxunukenakote.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_off0000585a.bin
28e62e260ebe8dbf70ae66089ebdd1df34c1920d60b558da2b54f5243554ee94
pdf-font-stream PDF embedded font (sfnt) at offset 0x585A 5616 bytes
font_01_sfnt_off00006b59.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 2116 bytes
font_02_sfnt_off00007525.bin
5431b9191cc7950643088d613be379b1f741b2fc3102dc281bd7d0ba9edc52a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 14976 bytes