Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b23bcdafd395b4…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 04:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa2def7e482fbc643e4dda38bd41ecf SHA-1: 2ec2e6b1d4c0b1411e1f615e62e1279114a82386 SHA-256: b5b23bcdafd395b4113fc3adfc45fcc0c6b31e88b7d9850047769071e80f3920
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=alumni+meeting+report+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for downloading a PDF. No scripts were extracted, but the structure and URL reputation strongly suggest a malicious redirection or download attempt.

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=alumni+meeting+report+pdf
    • http://files.bestclubsnyc.com/uploads/1/3/1/6/131637316/rexejudu.pdf
    • http://zusovurab.glennorion.com/uploads/1/3/0/7/130739024/2220913.pdf
    • http://wazazune.outhustleathletics.com/uploads/1/3/1/4/131452977/02f9a15b896a4ff.pdf
    • http://files.justinleokennedymusic.com/uploads/1/3/0/9/130969062/8567a324673072.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/advanced_trainer_2nd_edition_download_vk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/21350617224.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/xezojeladudisevev.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/92418905685.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/42142634427.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/7229924728.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/sedra_smith_microelectronic_circuits_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2057/files/obras_de_augusto_comte.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/budgetary_planning_and_control.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/junizolerizewuzuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/97717220579.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/17493320071.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/49110458288.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/lenovo_z6_lite.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_off00007a10.bin
06091cbdb280fbe0aa34fb93508c88bbb954a6aa3953b03ea03caabdc4bcef57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 4960 bytes
font_01_sfnt_off00008ae3.bin
2fc8668d64293a20ffa6e886b23873eb9e5e04383c7faa2df1b7ec5be06fd52b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 9956 bytes