Malicious PDF — malware analysis report

Static analysis result for SHA-256 995ce13fa9ae4844…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 05:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8295a6f01ead67756bdc07c3d23e5148 SHA-1: 8f413107b2e88d82db45f0f7d71234f88c13876b SHA-256: 995ce13fa9ae4844787a05d68bd451b924473f18e8bb81e8546d9d34de6d0016
120 Risk Score

Malware Insights

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

The PDF contains a link farm, with one primary malicious redirector URL and numerous other links pointing to benign Shopify-hosted PDFs. The primary malicious URL, https://ttraff.ru/pify?keyword=android+box+chinese+drama+app, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains this malicious URL, reinforcing the lure. No scripts were extracted, and the PDF structure itself does not indicate further exploitation beyond the malicious link.

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=android+box+chinese+drama+app
    • http://files.sweetcorndevelopment.org/uploads/1/3/1/3/131383398/e78d50.pdf
    • http://files.swimbhsc.com/uploads/1/3/2/6/132681769/sixolufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/boldbeast_call_recorder_pro_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/21703660387.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7943/files/gagekadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/answers_lootpack_traduo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/how_to_make_bee_venom_collector.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/70743666479.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/54407830706.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/86534585733.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/soal_operasi_bilangan_real.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/checking_itunes_library_stuck.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/sijejoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/1987/9079/files/37641306235.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
08d50b3dd18ca79d87e1a2994b5d7285d72fe02b956ed9a6e44237388f384000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5480 bytes
font_01_sfnt_off000074c3.bin
280097848642bad5d40b87b20f0ce64884664ebc5a09a95e136a2a5eb6152997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 10764 bytes

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