Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7c92209712d89b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-21 22:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60b5b8777e8ec709cffb473525636271 SHA-1: 879d986da76a0cb843fb6507392b3558d2863fad SHA-256: de7c92209712d89b13b6f66d8bf99d469bd722bc2830a55b3dbe6ba7c501bd10
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body itself is heavily obfuscated but contains the same redirector URL and a large list of PDF links, many hosted on cdn.shopify.com. This indicates a link farm designed to lure users to malicious content, likely for phishing or malware distribution.

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=add+fractions+questions+and+answers
    • http://files.ddowell.com/uploads/1/3/0/7/130775380/delevemajakimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/chava_kadambari_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9575/6693/files/flagella_types.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/puvapojurifap.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/barriers_to_change.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/miziveke.pdf
    • https://cdn.shopify.com/s/files/1/0433/8968/1822/files/mutotir.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/49574660257.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4797/files/pdf_to_word_converter_software_download_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/notezibeteranezezimugevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1985/files/turukinoditexefakadan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/nefitesezerokepuvoxoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8437/2386/files/paper_mario_countdown_to_chaos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/convertisseur_youtube_mp4.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_off00005dcc.bin
094cb041aff9f2534f17dd8ca6801e53ffe9b80d7b1b606d265ff8ff69235d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 5192 bytes
font_01_sfnt_off00006f89.bin
9484832d9bf7d0d8eb0d633ebbdbd486e0d283252348b73f3d815e751214de36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 10536 bytes

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