Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e116d2112c43ed…

MALICIOUS

PDF

44.8 KB Created: 2020-09-08 19:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ca015c1b74c1e6512ca6ba1a57d381 SHA-1: 9535e07dd1a6cece4cb7f069c3ba5d6949b31eab SHA-256: 12e116d2112c43ed8ae30305b63bc7987ebb491283b4a3d4f636d9b666f726de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to financial statements and includes the malicious URL. This suggests an attempt to redirect users to malicious sites under the guise of providing resources.

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=financial+statement+analysis+case+study+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5663/3758/files/the_american_pageant_13th_edition_chapter_11.pdf
    • https://cdn.shopify.com/s/files/1/0463/6200/1563/files/student_engagement_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7650/files/tnhd_movies_2018_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/cctv_camera_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/buriligif.pdf
    • https://static.usrfiles.com/ugd/b11f6d_cb8438f2b6f84235947356a3aea8e20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_505abca3aef8406ab29fe075d84f84b2.pdf
    • https://cdn.shopify.com/s/files/1/0434/7133/9686/files/ndlea_referee_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/ielts_writing_practice_test.pdf
    • https://static.usrfiles.com/ugd/49be48_b97ec004eb54408688e6f67d13cd467a.pdf
    • https://static.usrfiles.com/ugd/d9e9a0_e8f1abe8dad0498ba63e467fdea6082d.pdf
    • https://static.usrfiles.com/ugd/e6092c_e9cbdfc4b61b417db0a59b7eae158b93.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_off00006f9a.bin
ff3a9fa119b585f1dd019d29f349cc4e890b43f4576f2746da8f7893f1b1e6a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9A 5260 bytes
font_01_sfnt_off0000817f.bin
9f471f8947ba240fee54088129456b371cfec68a628c2c95125d298c985735a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x817F 10728 bytes