Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cab8be6ba0499af…

MALICIOUS

PDF

47.1 KB Created: 2020-08-31 22:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5159fa47e90f080f52dee7ebc952c50 SHA-1: fece3a422301178d7bf33eab040cb0d6b6509dd0 SHA-256: 6cab8be6ba0499af497d21712d03ed510cd609033dc48f9a58cb217a143e4950
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, likely as part of an SEO link farm. One prominent URL, https://ttraff.ru/pify?keyword=professional+video+editing+software+for+android, is flagged as a malicious redirector. This suggests an attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=professional+video+editing+software+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/jomapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/75525668154.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/52393844722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/zasekej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/zijewelisaruj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/67876957322.pdf
    • https://cdn.shopify.com/s/files/1/0440/0676/8798/files/italy_visa_information_in_dubai.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/popavibaxezogin.pdf
    • https://cdn.shopify.com/s/files/1/0441/1896/6424/files/48874024474.pdf
    • https://cdn.shopify.com/s/files/1/0462/6336/9882/files/kowuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/siridoxanajuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/lexique_mathmatique_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/98801863388.pdf
    • https://cdn.shopify.com/s/files/1/0435/3327/1191/files/duvudavudezugewarilenal.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/strauss_partial_differential_equations_solutions_manual.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078e4.bin
e3ef46f0375af2abfbf80c6d45028bc1c3dfd768eefa936aaa34f1c0490bdf4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 5228 bytes
font_01_sfnt_off00008ad0.bin
f1907398e21c1bdf14783995ea6d0af280405ccd6656232a96fc246d2360fc34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 10748 bytes

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