Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfc49d7c8f482b7…

MALICIOUS

PDF

48.5 KB Created: 2020-08-25 12:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42be21c3ff68ad355feade575222b8b5 SHA-1: db149b14c7b1dbf877ac20db45fba2a639853896 SHA-256: 3bfc49d7c8f482b76a42ec5f4834459ef684332469ead0e8ce0a10c2aa9c2020
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=spoken+english+grammar+pdf+in+tamil', suggesting a lure to a malicious site. Additionally, a large number of external PDF links were found, indicating a link farm strategy.

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=spoken+english+grammar+pdf+in+tamil
    • http://jabatogim.vespawanderers.com/uploads/1/3/1/1/131164250/rifubavewixovejek.pdf
    • http://niwepu.asiabizgroup.com/uploads/1/3/0/9/130969204/jolubapovujagon.pdf
    • http://lixefeb.teresasthriftytreasures.com/uploads/1/3/1/4/131405927/1105c50baab62.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/boogiepop_and_others.pdf
    • https://cdn.shopify.com/s/files/1/0460/1810/1407/files/pulsed_shortwave_diathermy.pdf
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/39683293648.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/jovevumozupebeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/timesheet_calculator_decimal.pdf
    • https://cdn.shopify.com/s/files/1/0459/2805/4951/files/62292006958.pdf
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/convert_avi_to_gif.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/linifizefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/jepelun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/kopizeguzepukolosinefoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/83765245567.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000074a9.bin
587bc183ccac425fe01907cfe0a490936eb112a32722e5e310b8a000cc207bde		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x74A9 11320 bytes
font_00_sfnt_off000061b5.bin
86a934a83019646c50ba77e2c8a05b997c87887ab2865ce48523b7de05c3f100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5620 bytes
font_02_sfnt_off00009281.bin
99b63a8bb467425573e2779d1f47d5d3d71f08aaaba0001837744950e704553c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9281 10044 bytes

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