Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be3754e1fe9bd3a…

MALICIOUS

PDF

112.8 KB Created: 2020-08-10 16:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77a9ee0a1179c1ab5a2e4c7cad3fd503 SHA-1: 2a8decfe75cadd501d74d45f1079bc63f000d4c4 SHA-256: 9be3754e1fe9bd3a6c8bf8404afe52836008d35ed77cc70e3f3552569596b173
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a fake CAPTCHA prompt designed to trick users into clicking a link. The embedded link, https://ttraff.com/pify?keyword=english+grammar+in+use+supplementary+exercises+pdf, is identified as a malicious redirector. The document also hosts a large number of external PDF links, many pointing to shopify.com, suggesting a link farm for SEO manipulation or to obscure the malicious redirector.

Heuristics 4

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=english+grammar+in+use+supplementary+exercises+pdf
    • http://files.altarwind.com/uploads/1/3/1/3/131380600/a5b7a2c015045.pdf
    • http://files.nundahpetsitter.com/uploads/1/3/0/7/130776511/rivosawutusi.pdf
    • http://files.nuwaybuilders.net/uploads/1/3/1/3/131398010/wovewatire.pdf
    • http://files.shannonvilledrags.com/uploads/1/3/0/7/130774962/kasunogosebutido.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/47734996221.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/xaludanebiv.pdf
    • https://cdn.shopify.com/s/files/1/0447/7108/2391/files/benin_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/99320826164.pdf
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/espresso_english_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/23712480867.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/fiviboxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/rijivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/gigofalobip.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/probabilidade_binomial_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/ccna_routing_and_switching_lab_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/sexowir.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/auditing_and_assurance_services_in_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/1587359507.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_off00015cdd.bin
974963d948cd2fe1f4d3d75a53c49f9b0937a91ed18fec4462dccea0ef37a312
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDD 5696 bytes
font_01_sfnt_off00017020.bin
77441259c053d88162441ccadc6d3506d1d0e08bd79a367cdf5d134eb2b03488
pdf-font-stream PDF embedded font (sfnt) at offset 0x17020 15276 bytes
font_02_sfnt_off00019f94.bin
0674acd334b5d9d24fca46324cf24cdceda2da50095ae44f67deaeca14b27464
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F94 16240 bytes