Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30ef80041c36e1c…

MALICIOUS

PDF

47.5 KB Created: 2020-08-21 08:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a11026757e2c6bb2f60c0325d37efd86 SHA-1: bef557188c3f37ef50c1a2b75d1b42f79262d0fc SHA-256: a30ef80041c36e1cd04d31164c12e3b51ed36869727a5b7ee0ce5a3fe10931b3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=writing+skills+practice+an+informal+email', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=writing+skills+practice+an+informal+email
    • http://files.nativepflag.org/uploads/1/3/0/7/130775115/9532675.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • http://files.birthbeforeandafter.com/uploads/1/3/1/1/131164442/9808467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/17329555587.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/the_school_white_day_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/puvepiruzutazow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/salamanders_codex_supplement_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/jularoleji.pdf
    • https://cdn.shopify.com/s/files/1/0431/9130/4343/files/dark_flame_alyson_noel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/66084344634.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/annotate_chromebook.pdf
    • https://cdn.shopify.com/s/files/1/0447/8536/9239/files/acrobat_reader_installer.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/74616716177.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/adenoma_tubular_con_displasia_de_bajo_grado.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/86040371526.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_off00007a8c.bin
3395f8e4a955e85c051d62f7b23579a78e0298c8dde4698c09c765fc61468c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 5412 bytes
font_01_sfnt_off00008cf3.bin
c94506ae63954537aceda6171a9cbbbfebf53e3b72de7fd8e01a9cf35175f56f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF3 10408 bytes