Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ea2d405dfc7dba…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 07:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf942881636aec3deaed0b65c6b0bb1 SHA-1: 7b7796ab6a14b6bd364d4d52584224bfb3be33c2 SHA-256: 88ea2d405dfc7dba6d87bcf4c99b05fd368fa806807bc9e48dd878b6f60d8eaa
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent URL leading to a redirector. The ML classifier strongly indicated maliciousness. The primary malicious URL is https://ttraff.cc/pify?keyword=calendar+schedule+template+2018+excel, which likely serves as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=calendar+schedule+template+2018+excel
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/67203863235.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/wobumulelusogojelum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/87345968526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/skyrim_here_there_be_monsters.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/sipazujo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/eminem_square_dance.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/bingo_template_3x3.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/56579408710.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/gender_pay_gap_reporting_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/62484702873.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/tracy_chapman_greatest_hits.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/mavaxusefeb.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_off00006dac.bin
4a48c3ee207648bf4b4f5f0134cc3bb550fbbe7b15738b95d2ca3c90954c7f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAC 5804 bytes
font_01_sfnt_off00008144.bin
370a63458a651ebaa8ec61f9e42812ef67208b48545b42bb82a30ea2922dd78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 9980 bytes

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