Malicious PDF — malware analysis report

Static analysis result for SHA-256 446c28907ce79120…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 11:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e73f3e541b6fdc14550af84df4b4a53 SHA-1: 35a793be0f21da53464e22ea5f8eec627a98a5b2 SHA-256: 446c28907ce79120b7565c9c4729136d717633a5c7e2793a4bc754afb7bd5326
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=certificate+template+publisher', is designed to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify. While most Shopify links are benign, the primary redirector is highly suspicious. No scripts were extracted, and the document body is heavily obfuscated, preventing further analysis of its direct intent beyond the malicious link.

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=certificate+template+publisher
    • http://files.sthomaskensaltown.co.uk/uploads/1/3/1/3/131383837/jofifina-vumiwaxu-pavapimik-kidexebuborelor.pdf
    • http://files.learningaboutamericanhistory.com/uploads/1/3/0/7/130775197/goketited.pdf
    • https://cdn.shopify.com/s/files/1/0432/2371/1903/files/nemosafemamukulipanolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/happy_birthday_wishes_song_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6951/files/base64_encode_file_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/superlative_adjectives_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/anlise_e_interpretao_de_dados.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/free_music_sheets_for_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/nununiwopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/pudetomovijubogelex.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/wakfu_sadida_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/19607164172.pdf
    • https://cdn.shopify.com/s/files/1/0435/6522/0003/files/85347133648.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_off0000630b.bin
5fc67d8228c11476da37847c66740dc96df4ae446813fd17b84aa5044e2d1d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 5300 bytes
font_01_sfnt_off000074db.bin
33857eba68110f0ccdb45e8f7dd95c67b2857e094742ab3b25ec80434cbd4e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 13392 bytes

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