Malicious PDF — malware analysis report

Static analysis result for SHA-256 896d6c99250094e5…

MALICIOUS

PDF

32.3 KB Created: 2020-09-13 01:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 151ab72024bd76231e9cdf2e057d00dd SHA-1: 4290f55f6c271c48305caed4f2a2633234b640d7 SHA-256: 896d6c99250094e55bfb30239a5298dbb54e09a165b581375afdcad5b06a44b5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.link/wix?keyword=our+guide+is+the+quran+lyrics', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external malicious content. The presence of numerous PDF links, including to Shopify domains, indicates a link farm or redirection strategy.

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.link/wix?keyword=our+guide+is+the+quran+lyrics
    • https://cdn.shopify.com/s/files/1/0468/8550/3133/files/47917663036.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5222/files/ionic_bonding_worksheet_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/62185895339.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/79508112084.pdf
    • https://static.usrfiles.com/ugd/8d5d69_76bad576aa6041ebaa6d7d20a77135b7.pdf
    • https://static.usrfiles.com/ugd/c6ac46_c7ced45f91ce4ca09f2c37533157873e.pdf
    • https://static.usrfiles.com/ugd/ac0094_473331b68f4a4827846b9a6adb663770.pdf
    • https://static.usrfiles.com/ugd/a58b01_d86a1a1bcb37499db09959a262ed7d25.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_ad56d97316dc43d78c749f26fa1067e1.pdf
    • https://static.usrfiles.com/ugd/9ef0c3_d106aac2c30349038c81321886e17eba.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_off0000405b.bin
d73a1a4835a7bc57f446ecefe99e337e594c616895a708423180a1cd146d807a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x405B 5456 bytes
font_01_sfnt_off000052e6.bin
31017e81c441f05c46e75dd327d66aee5c58c97c3d52ed54a95678ca016f84dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E6 9976 bytes

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