Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b72213b1757ffc…

MALICIOUS

PDF

40.7 KB Created: 2020-08-02 09:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0991b9e4b67e4d75dcdc96ab9421b2 SHA-1: 85fefd9e56b8751b41c16bce754204c38d0ed419 SHA-256: d5b72213b1757ffc93dd6f0510905d731a8abec9791d7c05b58da31b2194f860
120 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=cydia+ios+9.+1+emojis'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF was flagged for containing a mass external PDF link farm, suggesting a tactic to inflate search engine rankings or distribute malicious links widely. No scripts were extracted from this sample.

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=cydia+ios+9.+1+emojis
    • http://files.staiguefortcottage.com/uploads/1/3/0/9/130969190/74ff1adc06f.pdf
    • http://files.jordanalmes.com/uploads/1/3/1/6/131606367/fufunus.pdf
    • http://files.leducregioncares.org/uploads/1/3/2/6/132682441/dapanebu_pijifumemizeg.pdf
    • http://files.kadeandassociates.com/uploads/1/3/0/7/130738762/7848945.pdf
    • https://cdn.shopify.com/s/files/1/0434/1599/4529/files/bawolunir.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/96039380595.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/77641736627.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/repasitetaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/32815190623.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/gomasufudotiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/77442614486.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_off000060fc.bin
8cfc94ab02de8176f23586ba9c6404a9f0120c572fb6715431bb9123d90c075e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 5168 bytes
font_01_sfnt_off0000728d.bin
4147ad190696fa0ab0b6be6c09c91cea768f9834949b9bedbe2fce6dbabe39ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728D 10492 bytes

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