Malicious PDF — malware analysis report

Static analysis result for SHA-256 3371829045e8ee06…

MALICIOUS

PDF

46.5 KB Created: 2020-08-20 01:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04795bfb4c39d0b1ee3e62c1daf7eae4 SHA-1: ab273f144e84148a76e1189eed06f87585c92aa9 SHA-256: 3371829045e8ee06b9d82d0538aad7157eb8ef00f28d31b42af81dd0f8fa262d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=very+hard+math+riddles+with+answers'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or redirection strategy. The primary intent appears to be directing users to malicious infrastructure.

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=very+hard+math+riddles+with+answers
    • http://tuzuk.profitorganics.net/uploads/1/3/0/7/130775440/gunomojamupamujawo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/application_of_stack_and_queue_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/69110816275.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/71386269829.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/wezadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/86733813576.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/46424160778.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/automatic_bottle_filling_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/divikobaxez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/astronomy_today_6th_edition.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_off00007771.bin
2477c59736ac5404f11c9817a0ec797ca904713f9ff5b41f6a9ffd1830beb51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 5224 bytes
font_01_sfnt_off00008926.bin
238d9626d2ee2f2988744c1418fda63ff6d245bfa9419f5aef186e0386460dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8926 10716 bytes

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