Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3da155eb624fecd…

MALICIOUS

PDF

37.3 KB Created: 2020-08-20 05:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0abdd9d67406571a2d8a8d14042d92 SHA-1: f54f9b5c010c27b9a52e430f479c85ed56cc8afa SHA-256: d3da155eb624fecd9284a335128b25763e92c73090ec73221fcae79603a4c41b
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm. The primary malicious redirector URL is https://ttraff.ru/pify?keyword=chahun+main+ya+naa+tone. Many other links point to PDFs hosted on Shopify, likely part of an SEO manipulation scheme to distribute malicious content. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf.

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=chahun+main+ya+naa+tone
    • http://files.drthatchtutors.com/uploads/1/3/1/3/131383512/moxemewa.pdf
    • http://files.healdsburgartgalleries.com/uploads/1/3/1/1/131164063/b43cedd8ea.pdf
    • http://files.csungsf.org/uploads/1/3/2/7/132710671/lezex_xuxajiked_digijeforoj_puwewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/gupoxivefenifupameropik.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/80892904562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26433336276.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/barauni_thermal_power_station.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/wotigilorafeliduk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/structural_engineering_reference_manual_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/cooking_academy_game_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/41731655068.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdf
    • https://cdn.shopify.com/s/files/1/0438/9804/4568/files/zisemor.pdf
    • https://cdn.shopify.com/s/files/1/0449/3754/3848/files/accident_report_statement_for_insurance_company.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_off0000517d.bin
0e0bd361d8f702042dacd901b799d1562757f534ee4b1c1adea65bf1b85f7624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x517D 4624 bytes
font_01_sfnt_off0000610f.bin
7b89c8836992923cc030951200d0c147e5dc7232817d7518ae142f36fd1cd349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 11652 bytes

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