Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d7c0b933a9f568…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 20:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a1e7cca28038528a0d5b98a8c0c4d6 SHA-1: 8a8247e71d97ad9eeaff9c3c0db8505562a4699a SHA-256: 98d7c0b933a9f568d318083168ac8e8b53c0c496d5d4b2ee94a26fc75a95b6a0
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm. One of the primary links, https://ttraff.ru/pify?keyword=normalidad+anormalidad+pdf, is identified as a malicious redirector. This suggests the document's purpose is to lure users through a chain of redirects, likely leading to a phishing page or malware download. No scripts were extracted from this sample.

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=normalidad+anormalidad+pdf
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdf
    • http://files.cobaltcounselor.com/uploads/1/3/2/6/132682882/dfca1db518c.pdf
    • http://files.luxeavie.net/uploads/1/3/1/4/131437295/a4801d.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/35433877264.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/82111778312.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/nofunijimumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/steam_launch_options_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/savizapodujebexubetomek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/58657942764.pdf
    • https://cdn.shopify.com/s/files/1/0437/8257/0136/files/90874214536.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/95489191587.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/durga_saptashati_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/pigurefexisagedanaban.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/vigisuxaked.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/ketoto.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_off00006192.bin
67a0cc04c9a884374a840d333ac32a3ee1d69a97876895e0925a2b3a4a1977c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 4976 bytes
font_01_sfnt_off00007267.bin
d378a9d40c17118132f04336535fc028a791e5c6a2ea3015696f3718973fb1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 10576 bytes

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