Malicious PDF — malware analysis report

Static analysis result for SHA-256 c896028fbc21af3f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-22 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f7f6bd895a87755cabd66852123cfd SHA-1: 952705ae8c76f7261379a748455fe83edc13fbd8 SHA-256: c896028fbc21af3f64906b1c74dac3dc8e0b0297e67d3453daa0373d9474f163
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=android+auto+apps+not+showing+up', suggesting a lure related to Android auto apps. The presence of a link farm and ML classification further support malicious intent. The primary attack pattern involves redirecting the user 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=android+auto+apps+not+showing+up
    • http://files.kyharvest.com/uploads/1/3/1/4/131407274/janimozonesowonoduwa.pdf
    • http://tazaz.tandem-cyber-solutions.com/uploads/1/3/2/8/132814975/0a8b45eb.pdf
    • http://files.leighbivens.com/uploads/1/3/2/6/132682787/lagebutoluwimu_dekawamej.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/zitesowedemiwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/aditivos_alimentarios_colorantes.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/11779541945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/cancionero_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/vowekafalowirediniduxur.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7294/files/28416877628.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/19761767858.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0272/files/kenijivorowewiwifo.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_off00007705.bin
07ecdc601bade9f0a4350bf7e8c5b5561722b10c5bc4b5aad16c2de1944ed675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 5272 bytes
font_01_sfnt_off000088f9.bin
d7fbdb5f49d092efff840c66d9af757fe151ec30f07669dce1600e0d0aadf4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F9 10548 bytes

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