Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f5757243e34b38…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 21:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4143924cd08721382e0ae9e8d0ebb29d SHA-1: 2de26738c2ca708ae45932328862bd760d446ec1 SHA-256: e3f5757243e34b38bb1cab1ee627d5455755aafdc6d896c6a4895892b7e81470
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=java+basic+programs+examples+with+explanation+pdf', is designed to lure users to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on Shopify. The authoring application 'wkhtmltopdf' suggests this may have been generated programmatically for SEO spam or malicious redirection purposes.

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=java+basic+programs+examples+with+explanation+pdf
    • http://files.matchmypartytheme.com/uploads/1/3/0/7/130775651/rujezela_jawabar.pdf
    • http://kelodi.nycbroadway.net/uploads/1/3/1/6/131636648/711351b2224e1bd.pdf
    • http://files.thediscreetsommelier.com/uploads/1/3/1/3/131383720/nozidati.pdf
    • http://files.timmilner.info/uploads/1/3/1/3/131378852/9020121.pdf
    • http://files.paulasherbals.com/uploads/1/3/1/1/131163976/f0db4d7df31421.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/game_copy_world.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7310/0184/files/19956185130.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/43164650321.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/82319261354.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/78083210651.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/partition_piano_valse_amlie_poulain.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/2746928238.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/wogodobajowopatokamogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/dikipet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/pusogonifufelulabarifize.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/liletesodologod.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_off000079a3.bin
b91c8053af27777be42ebcf45bff23d9e729c77b2f880a7d8e5721f5205bdd9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 5916 bytes
font_01_sfnt_off00008db0.bin
9cc45092bab2cd2a1ba8785e8f5f7ae5f10c748f639ed6e6d156266a3582606c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 10624 bytes