Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39e02eafb27c31a…

MALICIOUS

PDF

34.1 KB Created: 2020-08-20 04:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d55eb9f1d2166238bc691f02f1b3f3f SHA-1: 441a694f3f7d0801e6fb516c4f632c84b16f9251 SHA-256: b39e02eafb27c31af999e2d857a732ca6fc8896679204d24b803352eec32063b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure via the URL https://ttraff.cc/pify?keyword=calculus+b+v+ramana+pdf. The document body itself contains garbled text but includes the same malicious URL and numerous other URLs hosted on cdn.shopify.com and other domains, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/pify?keyword=calculus+b+v+ramana+pdf
    • http://kusoza.nileinstitute.org/uploads/1/3/0/7/130775997/gobekevalu_zibomiba_pigib.pdf
    • http://wunegiwa.glensheppard.com/uploads/1/3/0/8/130814297/387776.pdf
    • http://files.maryannscandles.shop/uploads/1/3/1/3/131398333/5795271.pdf
    • http://xatuka.maidencovechildrenscenter.com/uploads/1/3/1/6/131606490/jotibuwebosokupuzeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/2440/7961/files/41528985888.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/batukafiwopojoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/anticancer_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/winabisiralunimusojilunib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5942/files/nurse_uniform_store_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/99969401823.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/aadhar_card_form_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/contoh_amdal_industri_makanan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/jakavevekit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/bratstvo_crnog_bodea_17.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_off000047d6.bin
827d5f37791985d3e932707aef2cc809455220644cdc5711f4acb2831152a9f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D6 5408 bytes
font_01_sfnt_off00005a18.bin
6896156599dc961884cf63946b61662a8e1dff62803436ecc5821ef7884ab4ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A18 9920 bytes

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