Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c42573433d9919…

MALICIOUS

PDF

51.8 KB Created: 2020-08-23 10:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022f24c1ee87ba4929b2a61812c91582 SHA-1: 3ba709f4f650ca9173bf7b6d26d876ab82645ceb SHA-256: a4c42573433d9919cf5ad93fed667f853fc9c39ca2b898baf6e74bb8b7bc611a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=recruitment+process+steps+template'. This, combined with a large number of embedded external links, suggests a link farm or phishing lure. The document body, though heavily obfuscated, contains the same URL and mentions 'Recruitment process steps template', reinforcing the lure. No scripts were extracted from this sample.

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=recruitment+process+steps+template
    • http://jozomi.sweetpsdecor.com/uploads/1/3/1/4/131409200/b00a89dc.pdf
    • http://files.cuttingedgepetservices.com/uploads/1/3/2/7/132712234/32503e2e4259d.pdf
    • http://files.stagerightclub.com/uploads/1/3/2/6/132695732/ganujaweji.pdf
    • http://files.anchorageonthestlucie.com/uploads/1/3/1/3/131398360/jetewodefol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/27405826645.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/novegumemiguxigolep.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/the_anunnaki_of_nibiru_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/aggregate_impact_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/5665143597.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8526/files/cantata_one_regular_font.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/29675010032.pdf
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/adelaide_showbag_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/pagudurazebeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/pixuvukeragol.pdf
    • https://cdn.shopify.com/s/files/1/0438/0069/0848/files/kazotesesigip.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/highschool_musical2_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/96067847706.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/biogeochemistry_an_analysis_of_global_change_3rd_edition.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_off00008cc9.bin
3a4ae21d408ce758b59001df6cb0b3b5b0863c406c0f93927ad2e1971ca21ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC9 5084 bytes
font_01_sfnt_off00009df9.bin
f9761fc04a71ce31d031db47b2cdbafe2d9ca500fb7cc409bb294e063e85aa8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF9 10580 bytes