Malicious PDF — malware analysis report

Static analysis result for SHA-256 9009a253856990c8…

MALICIOUS

PDF

55.0 KB Created: 2020-08-16 20:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60bf1df69d0f0d94027e195534ce7276 SHA-1: 79296c0fcca35dd32f9770998b4007e3a4569082 SHA-256: 9009a253856990c80914c2d095e5f7229dc8b55f0999e3b97d7cc05f690d6038
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure. The embedded document body text, though partially corrupted, contains the string 'module 6 expressions and equations answer key' and a URL that matches the malicious redirector. This suggests the document is designed to trick users into clicking the malicious link under the guise of educational material.

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=module+6+expressions+and+equations+answer+key
    • http://files.oaklandchristianchurch.org/uploads/1/3/2/7/132711999/mosonajatogel_zotamarume_vegeragek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/shchedrin_basso_ostinato.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/modal_verb_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/10_muharram_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/fajolonapetoferolosamimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/lizebugizije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/margaret_atwood_alias_grace.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/zefoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/boston_market_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/mukubutokonopus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/business_management_books_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000892b.bin
88601f145407e745061f549e0b63e40fbfcb5f46b89c166f4a046d33622289da
pdf-font-stream PDF embedded font (sfnt) at offset 0x892B 5444 bytes
font_01_sfnt_off00009bd9.bin
9d9494b28e039b1b11c075e73b43f7a24627e4d1b846d605029500d66919ef0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD9 11176 bytes
font_02_sfnt_off0000c0fe.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FE 4324 bytes