Malicious PDF — malware analysis report

Static analysis result for SHA-256 758dd282bf06f106…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 00:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48fe75606ab6a480c10c051ba4131eff SHA-1: 44480e687603649f62dde2400a090d57bf5ea435 SHA-256: 758dd282bf06f106ee431375f2ff9fee0e5d4cff36886b317b1007ffa37203f2
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, masquerading as a worksheet, with one prominent link leading to a known malicious redirector. The document body text, though partially corrupted, includes the phrase 'Farm animals activities worksheet' and the malicious URL, reinforcing the lure. The presence of numerous Shopify-hosted PDF links suggests a link farm designed to obscure the malicious redirector.

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=farm+animals+activities+worksheet
    • http://files.oehlermill.org/uploads/1/3/1/4/131408572/2815759.pdf
    • http://files.babylonbanknotes.com/uploads/1/3/1/6/131606789/gujukagagimi.pdf
    • http://files.pongdeelab.org/uploads/1/3/0/7/130775730/3809623.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/69218722039.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/zewasexegifujefoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7671/files/baldur_s_gate_descent_into_avernus_the_trove.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/zelekajudosadinaxajunon.pdf
    • https://cdn.shopify.com/s/files/1/0460/9703/9524/files/14793655165.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/xokabowaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/wumubumafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6802/2172/files/deluvudokotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/lekofivobigewefir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8190/files/jijenebaxitixo.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_off00005c82.bin
c9477cf8789adfe6ba5cc7938401d83e627bbe5e0bb16aaef5de93329ad992d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C82 5212 bytes
font_01_sfnt_off00006e22.bin
dcb459a35811839c19c6f02ec883c4406af8f4b478304071f5eaa558b4fd77f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E22 10180 bytes

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