Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6cda6c89782ef51…

MALICIOUS

PDF

61.0 KB Created: 2020-08-23 04:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12fdb629048194ab8c242c74d6eff61a SHA-1: 47cd2285730344cf87ac6d2e7a75cbb3067981f8 SHA-256: b6cda6c89782ef51b1e9137d3244ad7131aa863c758d8cfcc70879e80656c538
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Ayushman Bharat Yojana form pdf' and a URL that redirects to a malicious domain. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the ultimate malicious destination. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ayushman+bharat+yojana+form+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ayushman+bharat+yojana+form+pdf
    • http://tawipo.browneyedbabsknits.com/uploads/1/3/2/6/132682883/ea6c8.pdf
    • http://files.justflowfun.com/uploads/1/3/2/6/132681556/kiketemik.pdf
    • http://files.musicforyoungviolinists.com/uploads/1/3/1/4/131408241/0d95beb4.pdf
    • http://wumiwud.katscleankitchen.com/uploads/1/3/1/3/131383613/5968378.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/gemijewuninakixuwom.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/advocare_24_day_challenge_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/41661435972.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/livro_dieta_anticancer.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/30308650571.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/30834372447.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/85054960347.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/10822702877.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/bimuk.pdf
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/38896534261.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/maria_b_formal_wear.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_off000083df.bin
d8864de06f545812f21d5a39a0ba9d648f0d6070358065d50f699c0f9a7a3057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 5556 bytes
font_01_sfnt_off0000969e.bin
a686b431f47e4ed6c7630d110208b503ded47fb1d5d92b7a8defa5cd9b7a91ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969E 10552 bytes
font_02_sfnt_off0000bafb.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFB 16164 bytes
font_03_sfnt_off0000d04e.bin
4a219cbbf648ff0d6ca73b169b741584302f5c35e9140c8bc9e51942f8691732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04E 6188 bytes

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