Malicious PDF — malware analysis report

Static analysis result for SHA-256 a645db48acc3917b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-02 04:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ac0e394897548bd1dd17e6600052b6 SHA-1: 14f64c5e04dcf1103771c0ca9914ccf0eb89e23b SHA-256: a645db48acc3917b63a1eb4b3319c75853db5276f50b3eb6e5b3c638bf97bc35
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic firings indicate the document is designed as a link farm, likely to obscure the malicious destination. The presence of a 'download button' lure further supports the malicious intent. The primary malicious URL identified is https://ttraff.com/pify?keyword=rooter+nexus+7+2013.

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=rooter+nexus+7+2013
    • http://files.roadrunnerkitchen.com/uploads/1/3/0/7/130775583/vejukedet.pdf
    • http://files.tatskincare.com/uploads/1/3/2/6/132683088/1987885.pdf
    • http://files.matthewmixes.com/uploads/1/3/1/4/131438161/vavifeviwuto-sodaxovub-saturozosedul-ridekijarewaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/73923570116.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/89446906918.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/seligidaparagemewafosoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/13763311411.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8423/files/29883328365.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/rawutojurirozubaterag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/52755341796.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/viviwomimemav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/lorumozegafuvutowupiwigef.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/zurafufubaxotedazewidewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/bears_message_board.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_off000079b0.bin
b55c10c753da132d654216da5a4b04ccca46ce1a52a78e8c952e60d751c0c1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 5084 bytes
font_01_sfnt_off00008b20.bin
448628d879c328a4393f0836c4dcad783ade29406c2069ed4d5836dd82841b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 10332 bytes

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