Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45af79c9342d90f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-11 19:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bc3406d6db07fe6773123578e58ae1 SHA-1: f835df59d3105f77c66f7d2c1ee0cf37222ada78 SHA-256: f45af79c9342d90fa9a54a854fb15ad0b66edb08e46bac456e743d935fc10d8d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to direct users to malicious content. The document body, though partially corrupted, includes the text 'Materi akuntansi keuangan daerah pdf' and the malicious URL, suggesting a lure for users searching for such materials. The presence of numerous embedded links, many pointing to Shopify, suggests a tactic to obscure the malicious redirector and potentially leverage benign-looking domains for initial distribution.

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=materi+akuntansi+keuangan+daerah+pdf
    • http://bewixoso.inter-clubtennischampionships.com/uploads/1/3/1/3/131380213/6124933.pdf
    • http://nawutal.tcislibrary.com/uploads/1/3/1/4/131438216/ccef63a4d1d75.pdf
    • http://files.usstheodoreechandlerlettersfromasailor.com/uploads/1/3/1/3/131398428/nubowosagixube.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/44516069638.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/73386162674.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/dipofuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/ammonia_solution_msds.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/98614070010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/minecraft_ftb_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/66623420055.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/kubaxikukivatesawuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7719/files/java_applet_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/41061757219.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/simavawawabikirijaleto.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/57992383144.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_off00006697.bin
7fcf50f50511b466c94f1d731196d99b32bc90a71a9f1b5e3b780deaaccc1efc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 5112 bytes
font_01_sfnt_off000077f0.bin
a7ff79d72598e3fc45cbd6ecf3b8aba864f7d13d59fb63d2a8f99149ac6bc691
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F0 9940 bytes
font_02_sfnt_off000099c6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x99C6 4324 bytes