Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e2bdb76d4acfae…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 08:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a9e1edb08531ab3105b5dea04490d2b SHA-1: 7250028a3af015a18a8d2298c6ac6b0f950e16c3 SHA-256: d6e2bdb76d4acfae0f157088109d62c60479797b54c060cf97d29894b5d5f3ae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be largely obfuscated or corrupted, but the presence of the URL 'https://ttraff.ru/pify?keyword=blood+bank+guy+pdf' and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the primary intent is to redirect 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=blood+bank+guy+pdf
    • http://files.meadow-of-arts.com/uploads/1/3/1/3/131379085/189e537db1be.pdf
    • http://files.authorkmdylan.com/uploads/1/3/1/4/131455903/3664819.pdf
    • http://files.brothersinthewild.com/uploads/1/3/0/7/130739802/lokewavudukodig.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/zatubogiguduwujebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/67343449252.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/82318941214.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/understandable_statistics_11th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/fujigarorajudowunuzerezos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/30519133329.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/livapolegejopexugug.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/90690824469.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/administrative_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/73319475985.pdf
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/fudodi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/the_adventures_of_tom_sawyer_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/badimalepiwuripafugefuge.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_off00006258.bin
1081a51a49224de8034109570b989337e9390f919b42afa5298b4dc3b848756e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5288 bytes
font_01_sfnt_off0000747d.bin
49c44f8f6fa0139c032ce50d623037788e9001cfd490e48fc571cb5866bea0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747D 10352 bytes

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