Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51a578a16a0e878…

MALICIOUS

PDF

36.7 KB Created: 2020-08-14 21:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8474df259d10b031e3324cded8d62a2c SHA-1: 4ced45459c9d7681f66c24d759313042151b0628 SHA-256: b51a578a16a0e8783146742a59e400e3c4657292949a111c66ec6fb780f77078
128 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, masquerading as a download for a novel. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute malicious content. The SE_DOWNLOAD_BUTTON heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=dhanak%20k%20rang%20full%20novel%20pdf%20download
    • http://jupob.whiskeypirate.com/uploads/1/3/1/4/131453060/gesum_navaged.pdf
    • http://dapelu.knightwoodfrench.com/uploads/1/3/0/7/130775085/9993723.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/curso_de_ingls_avanzado.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/fracture_mechanics_anderson_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/70627872350.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/fixikatavutinole.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/cover_letter_for_cv_examples_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/92188731246.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/badawi_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/90554942668.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/53885017303.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/www_craigslist_org_knoxville.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/vixomoni.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/fokofanali.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/88833405056.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_off0000521b.bin
622b225740f9f927074513daf0a87f47c9c549a7cbae59b82367aaeb7aad11b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x521B 5340 bytes
font_01_sfnt_off0000645b.bin
90e23c049e6d4f1b7140cb54e08cd0c1bacddf760403b6eebf04730fddf9aab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 9780 bytes