Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4666d2d1bd7afb4…

MALICIOUS

PDF

48.2 KB Created: 2020-08-20 03:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04d6fd96e65c4fcefb1f9bbe5588c804 SHA-1: 3c9897ea7eeecdebf5081f5753a33f12b316ac13 SHA-256: f4666d2d1bd7afb4a43a1e80bd501f627b4ff765fd14d5045c4f49b89846bc4c
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=citra+android+2019+apk', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references 'Citra android 2019 apk', suggesting a lure to download potentially malicious software. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve search engine ranking for the malicious lure.

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=citra+android+2019+apk
    • http://xefebe.ladyteeproductions.com/uploads/1/3/0/9/130969153/xerak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/rafumuridomefulekesak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/27538090930.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/22137853566.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/duvojufepodunofaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/pabijesojenuxavopasita.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/60198477748.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/gizapiburulakuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/eclipse_juno_64_bit_zip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006d35.bin
91d0c99db9b7b9b4b5010f20137f4730f91d6e518ad08115b972be44c34a905b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6D35 12168 bytes
font_00_sfnt_off00005b86.bin
6d8508e46fdee46f2b31737b286d8cc962e1c1ce5935c6dc6ec1ec9c53a2505c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 5196 bytes
font_02_sfnt_off00008f56.bin
f29e7c5865c76539f38fa9af68ea66094cbf3badbf7fdd899fec2c55c9aa20f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 10364 bytes

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