Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4a3df52e6c8421…

MALICIOUS

PDF

50.1 KB Created: 2020-08-09 15:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00498fe6a83e955d5a319c0b60ee5a2b SHA-1: abc5ce7ea5895b547b34bb2b9418432fc919576f SHA-256: ae4a3df52e6c8421d00737438349b722703451e2e667a207bf9c15cc79ad271c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=java+swing+tutorial+pdf+oracle'. This URL is likely used to obscure the true destination and potentially deliver malware or phishing content. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

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=java+swing+tutorial+pdf+oracle
    • http://files.reliablealliancefinancialllc.com/uploads/1/3/1/3/131398279/4148b03aa.pdf
    • http://vowagom.karencougan.com/uploads/1/3/0/8/130814423/1919031.pdf
    • http://files.classyclothingcovers.com/uploads/1/3/1/4/131406412/5432607.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/20630043483.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/80158907025.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/garment_manufacturing_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/paxojipefado.pdf
    • https://cdn.shopify.com/s/files/1/0450/3647/0430/files/physics_randall_knight_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/55659239214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/75436300654.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/5047355389.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/clinical_anatomy_of_the_eye_snell_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3609/files/31618686798.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/50945791201.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b65.bin
96d53570c1542be8b8dd34a5fdda96300908842fc3c8495be1f84fc1854eba1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B65 5464 bytes
font_01_sfnt_off00008e2b.bin
6b43414a8aa1fc48bc5b3f53cab742533e7258c6b46d95cbdf30caeea321e341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2B 14260 bytes

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