Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0b41135f4165ea…

MALICIOUS

PDF

48.9 KB Created: 2020-08-14 20:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0331881f26fd6ef5451b60368ed3731a SHA-1: 0af5487007a6691e4d13e8cadc23a168b80ddfe1 SHA-256: 0c0b41135f4165ea3d8d574461ebd311c0cf37f3e355cc29264ff0ad5e9b2890
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body and embedded links suggest a lure related to cracked software, aiming to trick users into clicking the malicious URL. The presence of numerous external PDF links further indicates a link farm, likely for SEO manipulation or to obscure the final 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.cc/pify?keyword=ashampoo+winoptimizer+17+crack
    • http://files.elfencakesandbakes.co.uk/uploads/1/3/1/4/131406060/lidoxinugekox_maronevodemisut.pdf
    • http://files.lehrco.com/uploads/1/3/2/6/132683357/kesinujaved-javirirevezok-tegone-turebapas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/differential_geometry_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/jurobapukudixuxoziziw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/98562446788.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5046/files/18952819566.pdf
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/2142148574.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/82246113303.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/13299708585.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/fototropismo_vegetal.pdf
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/ophthalmology_clinical_examination.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/kuby_immunology_6th_edition_free_download.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cb.bin
507b573484ef03a90ca0fc2507a25c239c04f988b8716205f36401da5f9f8e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5468 bytes
font_01_sfnt_off00007763.bin
91a2537104c9736946061a397b86419b4d4dfb020286a7246ebeb6d996b7fed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7763 14396 bytes
font_02_sfnt_off0000a022.bin
ba49a359edda73fb432b2118eee43e8681603f6c6f845ef214af08c3a95321db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA022 16088 bytes

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