Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffb7d0b119df8ba…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 06:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf586d5a308aee7f87422faefc88e223 SHA-1: 9618b4c5b085e5df85792216aa1ad51153ee4eb1 SHA-256: 4ffb7d0b119df8baf013d477fc35a0c9ce1cb53eb278b99a9bbf7edb942da39e
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body text, though partially corrupted, includes "Food club bets" and the URL that triggered the malicious redirector heuristic. This suggests the PDF is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=food+club+bets
    • http://files.sathassociates.com/uploads/1/3/0/7/130740044/7bad8b835.pdf
    • http://files.coastal-curators.com/uploads/1/3/0/7/130776162/taxonudawugem.pdf
    • http://files.fancyimageyarn.com/uploads/1/3/0/8/130814601/rodilo.pdf
    • http://files.suzannejefferies.com/uploads/1/3/1/3/131383541/0ec32b397bada.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/51555398335.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/pegezofepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/836065632.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/88601641103.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/lonori.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/62541914317.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/resezigosuguzokotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/diliwate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/6063631331.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/77537935673.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/zoxefoleza.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/fosebametijixobi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/bank_teller_resume.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_off00006a46.bin
08b0a1cf69e64eb953c2ef80b7a70470ea761f202af5b0da903707b813ee5b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A46 4720 bytes
font_01_sfnt_off00007a69.bin
0a6847ba4733b0bdc3e19b8bc30f744f5d01e42b71b856bdf648310f9de9fad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A69 10120 bytes

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