Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5e08f7cc3a27d6…

MALICIOUS

PDF

116.6 KB Created: 2020-08-17 17:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e003a2ee7e8a190d8267d6d57c6c6080 SHA-1: 6968e2fdccaaf3d5086b8e90778e2c51a46945bf SHA-256: 3f5e08f7cc3a27d6038e930919bb312b005a025bd72a42a51f2b5092128cddb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=shin+chan+tamil+movie+2018'. This URL is embedded within the document body, suggesting a lure to entice users to click. The presence of numerous other PDF links, many pointing to Shopify domains, indicates a potential link farm or distribution mechanism. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=shin+chan+tamil+movie+2018
    • http://woxujoz.colleen-pearson.com/uploads/1/3/0/8/130813841/novuxiwa-gikapijivebaw.pdf
    • http://files.ka-bloomgroup.com/uploads/1/3/1/3/131380094/xuvate.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/mabogenie_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/74428097686.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/10989746449.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/folonates.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9180/files/50851035066.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/vawiloduxugiranenowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/carbohydrate_metabolism_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/vidifesasijotawukiwisak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/jonajafu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/fepipupopawinolazoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/doctors_excuse_for_work.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8020/2905/files/bixler_1._1_manual.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_off0000fdd8.bin
4c6175078403936b4bd6721e735dcd38f75abcfdcc9733d1f41c0cbd8bfc7848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 33544 bytes
font_01_sfnt_off00016712.bin
fd51eabb37af7f721c1c4250e3750af981b928e7f24fa616ce767efa32f67eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16712 5448 bytes
font_02_sfnt_off00017969.bin
2b0a088b87afa13c05c43a2cac4fd27525ba17be7ca3e34263f9d0235d10981e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17969 7360 bytes
font_03_sfnt_off00018d9f.bin
fa68277b82124f426b2e6e4c41a7dbfc1f93630978da399df10a698a7fb93624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D9F 17868 bytes

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