Malicious PDF — malware analysis report

Static analysis result for SHA-256 4986116e1e9ca8f7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 04:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b317f6c2bc21d578689bf8ba624c21f2 SHA-1: 4b33c86ffa48e647584805ef85ff6cdc930bd928 SHA-256: 4986116e1e9ca8f7661b256b74237200be9755d4b3f98602e8804d0d7a17d4d4
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a phishing or redirection attempt disguised as a document. The ML classifier strongly supports the malicious nature of this PDF.

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=off+road+computer+games+free
    • http://files.cardsforyourcause.net/uploads/1/3/1/6/131637606/39e40d00088e.pdf
    • http://files.northalabamadt.com/uploads/1/3/1/4/131406749/rekel_safikixeritikaj_kulasefabofono_donufip.pdf
    • http://files.sarahneedhamartist.co.uk/uploads/1/3/1/4/131407571/9cff79.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/trimple_of_doom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/pituxakovedeboze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/15616406297.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/dezivi.pdf
    • https://cdn.shopify.com/s/files/1/0452/5621/2642/files/37051502684.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/50853735302.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/chromecast_macbook_air.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/is_0_true_or_false.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/rewisodijiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/mamerekedezofovekole.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_off000069ca.bin
153199121678313efc046ddaabe8c7099838596626dec3daa805c0a770384b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 5468 bytes
font_01_sfnt_off00007c4a.bin
b42da6f6c6b9a07ec1dac0f5636cb62da3ad6d2947773ae862c513bca4926281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 10396 bytes

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