Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c3a849791c5eca…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 13:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49dfea105a395f54e20f5a90f5432081 SHA-1: af220bf77ee8e9673b83aa65196766c80938712b SHA-256: 27c3a849791c5eca059173761b57f9f3d36862c9b310647e0f23ff4ce578dd35
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com, which is used in a lure related to an 'Absa bursary application form'. The document also contains a PDF link farm heuristic, indicating a large number of external links, with the primary one being to a Shopify domain. The embedded URL in the document body further confirms the presence of a link, which is the primary mechanism for delivering the malicious payload.

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.com/pify?keyword=absa+bursary+application+form+pdf
    • http://files.paulaandersononline.com/uploads/1/3/2/8/132814286/5144864.pdf
    • http://files.sthenrywarrior.org/uploads/1/3/1/4/131453215/dolev_bowolunawenexi_xadunuv_ralafulamuj.pdf
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/26141681056.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/doganepotusetese.pdf
    • https://cdn.shopify.com/s/files/1/0433/2034/4731/files/mozepusojetefax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/terimemozizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/robin_hobb_reading_order.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/kotepeveduxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/50957827033.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/second_law_of_thermodynamics_entropy.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/piper_cherokee_140_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/86230985185.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/52063311392.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/32650351513.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/3d_to_step_converter.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_off000073e5.bin
b484493db2f04fd8f3a0e399dfd47018526403bb9e1a2b2cc2d3aa5edd38904d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 5532 bytes
font_01_sfnt_off00008699.bin
2f491894fdd36b3b33b6433b6de9e69390d2a0ef80bc3bf361ec0143bf53bdac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8699 10436 bytes

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