Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea900487758f2ca0…

MALICIOUS

PDF

38.5 KB Created: 2020-07-31 21:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515b151bd53d35091cfef6b44cc6b9ad SHA-1: 6d40d0593b56776301c6719f10d39d383c233c7a SHA-256: ea900487758f2ca0cde671f3c972091334d7e8d1125c735b64b28592f2790760
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the text 'Bol check digit calculator' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking and distribute malicious content. No scripts were extracted, limiting the analysis of further execution steps.

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=bol+check+digit+calculator
    • http://files.connallyband.com/uploads/1/3/1/8/131856381/koguwoxixude.pdf
    • http://files.orbhoa.com/uploads/1/3/1/4/131408537/bemipatoret.pdf
    • http://files.henrycountycancerservices.com/uploads/1/3/2/7/132740564/sigukipakulizeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/50924704894.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/nebumubeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9553/1424/files/588260553.pdf
    • https://cdn.shopify.com/s/files/1/0437/7349/3406/files/zomimidatisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/tuzisefeluzewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/kifusosirutodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/11643284743.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/kivis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/87882930575.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/wevotidam.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/kavajetagotafazajeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/malidupilisenibomedetur.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_off000058f7.bin
7e4e65626018a1e1950a9cd6712754ae3b0c05a44bc92b0d79d305f546221136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 5136 bytes
font_01_sfnt_off00006a69.bin
4eb2dfb6000aff986c628e782676f07fe3b2cebc49e632f75dcc560ed8b724ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 10656 bytes

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