Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6494f32ef958f3f…

MALICIOUS

PDF

35.3 KB Created: 2020-08-19 19:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e8ce27bc26cccdaa9c6a7f6e7f7f5f0 SHA-1: 25c06b923c3c3cd0d1298f8185ba49a69504d2f8 SHA-256: d6494f32ef958f3f6deec1f3cafc9a156bebde588a26eac43c8e363a00324bf8
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with a heuristic identifying it as a PDF link farm. One of these links, 'https://ttraff.com/pify?keyword=uc+browser+apk+all+old+version', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Uc browser apk' and the redirector URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous links hosted on Shopify indicates an attempt to obscure the malicious redirector behind a large number of seemingly benign links.

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.com/pify?keyword=uc+browser+apk+all+old+version
    • http://files.coregenicconstruction.co.uk/uploads/1/3/0/8/130813528/vujidulezapilidaw.pdf
    • http://mamiropo.jonijohnston.com/uploads/1/3/2/6/132681670/mitivekijawefugusi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/waxal.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/pelijoxinanurerogez.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/marine_corps_hymn_sheet_music_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/6505275757.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/makalah_anemia_megaloblastik.pdf
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/52161694761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/99500020991.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/fivajevumipimapuno.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_off00004777.bin
7e29d1c78bd21f69792c538afcb913e66a8d91e6ade4588ac758e817155415a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4777 5412 bytes
font_01_sfnt_off000059fd.bin
76d0742cc68661d9e616c19fe62749c0648c06306c6043f58f7cdde8613b0c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FD 12276 bytes

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