Malicious PDF — malware analysis report

Static analysis result for SHA-256 7697128d5d568e6b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 02:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7985a2b1bd54016ea877fef677e9fc89 SHA-1: 11ce2c2c21e389918936d386603a4ae285a909a0 SHA-256: 7697128d5d568e6b87c2b6d1c15c6811a4cfd7851e98458ba77b4a08957e3de8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=anatomy+physiology+of+skin+pdf', suggesting a phishing or scam attempt disguised as a search result. The presence of many external links, including benign Shopify links, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the primary malicious destination.

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=anatomy+physiology+of+skin+pdf
    • http://files.profabcorona.com/uploads/1/3/2/7/132712358/bojejodanukugozuxi.pdf
    • http://files.britishbelgianbantamclub.org/uploads/1/3/1/8/131857419/4590701.pdf
    • http://notozaz.dianesestatesales.com/uploads/1/3/1/3/131380213/4c95cac6a6c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/58817964061.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/23976877966.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/46503468900.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/the_south_african_constitution.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/nepuwumubafi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/3028984105.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/bodybuilding_workout_plan_for_mass.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/pokeriti.pdf
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/biblia_paralela_ingles_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/fanisudugivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/mewowexixedabevukito.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/82052805616.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/9442422921.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_off00006c37.bin
65eeb26596ed748f2e81558ceab869401df98c51db19c18cf0b9679cf41050f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 5512 bytes
font_01_sfnt_off00007ee0.bin
d2262e4d7f62a1b592555541975fc69093572b1b9cbaeb9b2ae0deb0cbd5cca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE0 10996 bytes

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