Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b80fa2fc4a32a17…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 07:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e26d4fee0e5aada51dcd2e19cb50f8 SHA-1: 94852460660e07590cc85ce37b3f1d998a548396 SHA-256: 8b80fa2fc4a32a1756e915b35c87b1f1c57f07987ed82c9df4627e47398b069c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=topographic+map+symbols+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is also listed as a potential IOC. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'topographic map symbols worksheet'. This suggests the primary goal is to redirect the user to a malicious site.

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=topographic+map+symbols+worksheet
    • http://files.santafecommunityresource.org/uploads/1/3/1/4/131409210/1c7b891f6a.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/50420241324.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/zelipowinanaliwalovepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/6295251368.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/20018976485.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/guide_professeur_alter_ego_a2_plus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/furopopupirizew.pdf
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/determination_of_organic_matter_in_soil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/malones_staffing_somerset_ky.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/bd_chaurasia_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/25305313814.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/sosorolezumivadupijik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/nugapajamip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/13936046861.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/fuminawutigagurew.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/41308138877.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/
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630b.bin
952bf9a4c54c44ffa104ec00425186cf0483d19cdfb01ffe9e6cbc9bc2474d1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 5692 bytes
font_01_sfnt_off0000765f.bin
a79a7f69ba34e76ba84502ca9f53ae4e39cdfc67036f90f734d675bb44e4a58a
pdf-font-stream PDF embedded font (sfnt) at offset 0x765F 10180 bytes