Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f9263d77453ea1…

MALICIOUS

PDF

61.5 KB Created: 2020-08-02 03:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9e23f4fff6dc0d0aa90a21d4b93e650 SHA-1: dbd24dd0445e1244554f6ccb97de27643ebb9db2 SHA-256: f0f9263d77453ea12dac97a6dfa1670c4f2967eb6b78952fcf1e42ecc0e204e4
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that appears to be part of the link farm, suggesting the primary purpose is to distribute traffic to potentially malicious sites or manipulate search engine results.

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/pify?keyword=hibernate+cfg+xml+example
    • http://files.richmondblackwidows.com/uploads/1/3/0/7/130775806/tirigufu_sefarazedato_sinizisemowurir.pdf
    • http://files.stephaniejacobs-sculptures.com/uploads/1/3/0/7/130738501/e713ba1899.pdf
    • http://files.3riversmuseum.com/uploads/1/3/1/3/131383791/ff4afd397.pdf
    • http://files.utopiafilmfestival.org/uploads/1/3/1/8/131856498/felofekebibozewofol.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/jonemuwewajojubezizeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/22119848292.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0435/files/16315713907.pdf
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/discord_type_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/242410434.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/96324697924.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9251/files/volufasugen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/93036789552.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/71814149877.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/sagore.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/22809793349.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/nexadikonibelinanis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/xotaravuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/win7_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/snow_blower_cab.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_off00009b92.bin
c7379d258c523ce34f31e92a44807038924a6c1adc910a8e8ad7491ad38d9442
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B92 5004 bytes
font_01_sfnt_off0000ac72.bin
96e21c3fbf5ddbb3d39d21ac885351596bc332eb3eea242cb87f0acb0eb5466d
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC72 14900 bytes
font_02_sfnt_off0000dac7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 4324 bytes