Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe7db77e047ce7a…

MALICIOUS

PDF

46.6 KB Created: 2020-08-25 07:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5932af2aeb0c8454ee332c70a8923752 SHA-1: 3796bedd4cc0bb022a5c0b5ae8c0a4d709c0b07b SHA-256: 1fe7db77e047ce7accc9d46d6c316132452af455b0734c764003f4b4eddbaafa
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure related to a 'Cisco cpak- 100g- lr4 datasheet'. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or distribution mechanism. The primary malicious IOC is the redirector URL.

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=cisco+cpak-+100g-+lr4+datasheet
    • http://files.tsceramics.com/uploads/1/3/1/4/131437930/zitiw-tasatololesapaw.pdf
    • http://revuna.temposhop.co.uk/uploads/1/3/1/0/131070786/wimifoxiboxagaw.pdf
    • http://mogolunug.barvinokseattle.org/uploads/1/3/1/3/131398140/burisarifigijod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/ruwepovosofesebisaxigim.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/xeweniwiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/avenant_contrat_de_bail.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/mecanismo_de_ao_dos_barbituricos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9816/files/55182403413.pdf
    • https://cdn.shopify.com/s/files/1/0462/4138/2560/files/carlsberg_brewery_malaysia_bhd_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/26918550299.pdf
    • https://cdn.shopify.com/s/files/1/0459/7127/5943/files/tabloid_broadsheet_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/95285327686.pdf
    • https://cdn.shopify.com/s/files/1/0437/3771/0744/files/58889772788.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/english_topics_for_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/16968310610.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_off00007714.bin
b27f3e53ab10cf9f58b780fc79bef1f8f005c1170777870a328fe168ea096273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 5616 bytes
font_01_sfnt_off00008a2b.bin
9b0d4c346eb9de1e5bfbdbdcc9ac1b2610759165ca5e32affb973aed13343f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 10248 bytes

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