Malicious PDF — malware analysis report

Static analysis result for SHA-256 d711f631569e8141…

MALICIOUS

PDF

46.8 KB Created: 2020-07-26 12:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e4a5b9aeb1fa03d0c62b52c33897ea7 SHA-1: dcd9dc5791e96942d6598d920a8a8947aa01cd3f SHA-256: d711f631569e8141bca3d749829f66ac4a4ca46b44125195b39c9f918fe01503
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'download button' lure further supports a malicious intent to trick the user into clicking the link. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a phishing or redirection attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=b.+t.+c+admission+form+2018
    • http://files.courtneymmartin.com/uploads/1/3/1/3/131379266/108701.pdf
    • http://files.i2cafe.com/uploads/1/3/1/8/131858044/4772210.pdf
    • http://files.topcosmeticgyn.com/uploads/1/3/2/8/132815123/zonikixa_zujowu_wijotod_xalobab.pdf
    • http://files.mtmaiello.com/uploads/1/3/0/8/130814110/6522901.pdf
    • http://files.topcosmeticgyn.com/uploads/1/3/2/8/132815123/zonikixa_zujowu_wijotod_xalobab.pd
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/pokesixidetinalikazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/jeraribimoto.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/sominutibipulotiwup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50833930904.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/11298082076.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/47313332366.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/nijebidebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/67503884721.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/xirasimewusuvino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/59074257550.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/76857392309.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_off0000785c.bin
e830350f243911df5f4043c28741e5515803bf1989363c75bb2ff0161e34ab35
pdf-font-stream PDF embedded font (sfnt) at offset 0x785C 5404 bytes
font_01_sfnt_off00008a9a.bin
9f3b4dbc6852631978e7a4014352ad14ac8b2af9d62b43d0a654f597557dba87
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9A 10448 bytes