Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d93b0c1aa73c57…

MALICIOUS

PDF

53.1 KB Created: 2020-08-21 18:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61c823dc323900ec38371605a5e02850 SHA-1: 28c4e24d107178b8629de9080e2a48c10ef5a09b SHA-256: 57d93b0c1aa73c57d8da2b1b62feef46ea574f8103b32daf675ace9b51365d8e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=android+studio+flutter+format+code, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'android studio flutter format code' and the PDF creation tool wkhtmltopdf, suggesting a lure to download or view content related to software development. The presence of numerous external links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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+studio+flutter+format+code
    • http://futamip.occidentallodge436.com/uploads/1/3/2/8/132814742/d992e8421a.pdf
    • http://files.ginaraehorvathphotography.com/uploads/1/3/2/8/132814155/wodinave.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/bunuluxon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/niccolo_machiavelli_the_prince_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/gexowupizoligukikidot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/dizovutegam.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/92015302451.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/52471656144.pdf
    • https://cdn.shopify.com/s/files/1/0447/7432/6438/files/alchimiste_francais.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/lopunesusiwemedizuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/zofran_davis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4224/files/florida_new_hire.pdf
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/mental_health_hotline_ring_tone.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006447.bin
1ecb50934d9e1e5630b767466f5ac70a6f2c86a7e0466cbfc2a7b15dc42db023
pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 5156 bytes
font_01_sfnt_off000075ab.bin
d0a7f4e18c296bf179fbbe5666c53fe9d028bc4bc880622fd851beee58b1db1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 5444 bytes
font_02_sfnt_off00008944.bin
4d82e493483df1341c56bf499f2ea33673b18aa5983c5eb8044e702475cdf654
pdf-font-stream PDF embedded font (sfnt) at offset 0x8944 10580 bytes
font_03_sfnt_off0000adaf.bin
c9777e502424e4dd7dc0329011bcb478617e9065a3a69cfcbc222fafd95be6dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xADAF 17376 bytes