Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0bfbb9d35575e9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 08:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79658cefb9ea02483930c11292af5bc9 SHA-1: 10e982ac028c9a0de4944258a7aba6644431dda1 SHA-256: 5a0bfbb9d35575e96c8c98bf5c183a96f4bc9d2867273e86deafb4fbac944a5d
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to a malicious redirector at `https://ttraff.ru/pify?keyword=calvin+and+hobbes+pdf+collection`. This suggests the document is designed to lure victims to malicious infrastructure, likely for phishing or further malware delivery. The document body, though heavily corrupted, contains references to the redirector URL and other Shopify-hosted PDF files, reinforcing the lure. No scripts were extracted from this sample.

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=calvin+and+hobbes+pdf+collection
    • http://files.croberts100.com/uploads/1/3/0/8/130814466/5082944.pdf
    • http://supiw.familytimefurniture.com/uploads/1/3/0/8/130814058/vaparid.pdf
    • http://files.thefabriclibraryenniskillenltd.com/uploads/1/3/1/3/131398252/71f20.pdf
    • http://files.shanghaiveggies.com/uploads/1/3/1/4/131438176/nolifelamemuz.pdf
    • http://files.lbtdlaw.com/uploads/1/3/1/8/131856991/1a9d8099.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/pesobabilijilitil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/86632901184.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/kibuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/wegobelojosisor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/pinisabixipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/buddhist_teachings_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/40190829449.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/biozone_3_4_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/99943125875.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/33376948298.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/modul_belajar_bahasa_jepang.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/piloruj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/43741872127.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/64733079847.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_off00006348.bin
2125c40c4afb55872616fc8fc847745c1a90b864330c5d8b5e1dfb388dd65eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5252 bytes
font_01_sfnt_off00007525.bin
bb3046a83b8e58b189ec2d618517224091cf9934f0398affb00ff986a4eebc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 9904 bytes

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