Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9047fbe1ec5eef…

MALICIOUS

PDF

63.9 KB Created: 2020-08-29 02:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3df06c0585140232c1ea93058f73865 SHA-1: e7ad640d0eeb36605f3bf2ad7eec066dddc036e8 SHA-256: 0e9047fbe1ec5eefbf6c418b6ca096bc35a195d7d3ca4c7a4877e31f4d6d0887
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches this redirector. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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.com/wix?keyword=autobiografia+de+benjamin+franklin+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/female_body_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/95237301274.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/advanced_paediatric_life_support_the_practical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/javamuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/28486974440.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8609/files/mepugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/alkaline_trio_full_album.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/1989_procraft_bass_boat_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/gosisexuxinufujoragegili.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/pte_academic_writing_practice_test.pdf
    • https://static.usrfiles.com/ugd/b8c837_fceb8642e2314bf49b72c69d942b1f56.pdf
    • https://static.usrfiles.com/ugd/b8c837_576b572585034db998e9fea34c285dc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59dde0f4c0644d98e617d6170bb45ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d781859c364d44bf916b5364f78662.pdf
    • https://static.usrfiles.com/ugd/b8c837_48151c44e7f5418980e2c23affea03ec.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb95.bin
f606eb11fe6a251d177ac93ab209b9d7a4c4e920e735e590f2945a2778cff57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB95 5452 bytes
font_01_sfnt_off0000ce0a.bin
52594609ad150d4c11ea2621ba4e34f9333f0e97195dfac1e28293378c172699		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 10684 bytes

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