Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dcd58557f5622d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 06:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c35de8849bad4699b4983b5f488b265 SHA-1: f547f6eb6f9b3d2c58722dd9f06c60675ee703bc SHA-256: b5dcd58557f5622dd3566e9b93a2bced3d5750f4dbefa65ab149ed8e2f51649b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed to either distribute malware or engage in SEO manipulation. The primary malicious IOC is the redirector URL, which is used to obscure the final destination. 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=granger+causality+test+eviews+pdf
    • http://files.premierebasketball.com/uploads/1/3/0/7/130775658/e64deae95b2b.pdf
    • http://files.midwestbooksellers.org/uploads/1/3/2/6/132681670/juruj.pdf
    • http://files.liquidgoldbfs.com/uploads/1/3/0/9/130968933/rexopabe_ripawonagokal.pdf
    • http://files.snap-scaffoldingfornumericalsynapses.com/uploads/1/3/0/9/130969440/2528393.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/associated_press_stylebook_2015_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/feline_calicivirus_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/mokefasetobapiterol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/kexozopebinavomiraluja.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/63269154894.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/47252378195.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/samigefataduxiru.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/fomotolobakutijusedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/gapunemoxegasifuwanaliz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7595/1005/files/aditya_hrudayam_in_telugu_with_meaning.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_off0000663c.bin
66209ec3c71cf9132aad653887158df0053dead03c4f1f7571a3a5fb57298ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 5608 bytes
font_01_sfnt_off0000797f.bin
ec8f53f8e4a627d99bd2a17de22fa3d2b2034d147cccd4deea37c9e229686a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 9688 bytes

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