Malicious PDF — malware analysis report

Static analysis result for SHA-256 2589dc1bb6f32f04…

MALICIOUS

PDF

49.8 KB Created: 2020-08-10 17:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1eef2c1b2a76776db3b9aaba2e19f4 SHA-1: 3c1c89cd35906fd22d973a2dcc408551861ee2ff SHA-256: 2589dc1bb6f32f04a141c642469e2a3fd92145f185a5f0ab2c97ca11c536ab62
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=validity+and+reliability+test+pdf', is identified as a malicious redirector. The document also includes a heuristic indicating it's a password-protected archive lure, suggesting it's part of a multi-stage attack. The presence of numerous links and the malicious redirector indicates a social engineering attempt to lead users to potentially harmful content.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=validity+and+reliability+test+pdf
    • http://files.ajreisingerlab.com/uploads/1/3/0/8/130813528/dewipo-rifuvegusekid.pdf
    • http://jujexob.east-baseball.com/uploads/1/3/1/6/131607240/b04c6bcb0.pdf
    • http://files.smokepitfairytales.com/uploads/1/3/2/6/132695476/6185635.pdf
    • http://files.gofabusa.com/uploads/1/3/1/4/131407625/visewinuvupaxav_zofasadugovet.pdf
    • http://files.brianbustosart.com/uploads/1/3/1/3/131383284/najaruveg.pdf
    • https://cdn.shopify.com/s/files/1/0449/2810/6651/files/learn_accounting_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/insert_multiple_rows_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/tajadakajotilimuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/vulagazajalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/xezuwulunupijirun.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/67889738218.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/88676852005.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/ladugeru.pdf
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/75329292066.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetuvoveluganimuwejipas.pdf
    • https://cdn.shopify.com/s/files/1/0451/2625/4745/files/advertisement_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/lufekutini.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/45699555739.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_off00008514.bin
da198a9c1c86da534fd743e6ae904929a8a483cc80d337c0953f7ae46673f067
pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 5240 bytes
font_01_sfnt_off000096f3.bin
61f56405ef319682eb4e4c6e1f5b7752851071f4922d3ed52b82da96a5d72210
pdf-font-stream PDF embedded font (sfnt) at offset 0x96F3 10240 bytes