Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9856314c0b3c58…

MALICIOUS

PDF

36.9 KB Created: 2020-08-10 11:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 456264c1d1443bd3b234a9dd1c41274d SHA-1: 93433d88ed6f2ffc5dcd3c0a066c64e3a5bcc966 SHA-256: 8f9856314c0b3c58a3e6f12cf424b562291e9813a917bc1a69205b2ddf16dfcb
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the heuristic, suggesting a lure related to 'BMS system in HVAC'. No scripts were extracted, and the PDF structure itself does not indicate further malicious activity beyond the redirection.

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=bms+system+in+hvac+pdf
    • http://files.gmmartinbooks.com/uploads/1/3/0/7/130776864/3e7b2f4dc20d3b.pdf
    • http://xagez.brucedaleestate.com/uploads/1/3/1/6/131637814/pajadopovowi.pdf
    • http://files.patchesfamilycreamery.com/uploads/1/3/1/3/131380308/sugumidomifusu_mumopisisamigak_saxabudode_paxinebiv.pdf
    • http://salosuja.michaelgreermd.com/uploads/1/3/0/9/130968984/jafamisisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/13015037688.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/fukubofade.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/clasificacion_hipoglucemiantes_orales.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/xupubizesimigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/duvavogev.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/54528876745.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/92825661675.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/42136033067.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/newiravanutuzewuvokalimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/fiviwim.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_off00005106.bin
758311bdd60e5125a4b4ab3b84aac40e685241cff467d5a0e99ea5bcaa7d274f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5106 5480 bytes
font_01_sfnt_off00006399.bin
2c95e9e170d1122cf195fe9b01b2d3d977133543fbdfa6082485e664dcadfbc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 10452 bytes

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