Malicious PDF — malware analysis report

Static analysis result for SHA-256 139e9eefbaa043f9…

MALICIOUS

PDF

333.9 KB Created: 2020-08-20 21:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac7a0e755ed892d47b16d72355948d91 SHA-1: f6458a191a35e63dd2a13a42f5b134357503c310 SHA-256: 139e9eefbaa043f96e5db1b4c37cef7485de40115655e9b4b22ed0e026b45e43
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain the same malicious URL, suggesting an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 3

  • 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.
  • 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=guide+tristana+top
    • http://files.lindsayvickery.com/uploads/1/3/1/3/131380213/papujile-gugapuzugajenif-bugilaruxipubes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/zesukumukebiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/dadeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/git_commands_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/rabixusegujil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7028/2142/files/litapupapifikuxebexexopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/movetetadiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/fugaritofenoxebezajesur.pdf
    • https://cdn.shopify.com/s/files/1/0438/1795/9586/files/armadura_de_dios_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/annulment_of_marriage_in_florida_forms.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/affirmative_and_negative_sentences_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/92361456574.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/bilabafufarokari.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/campbell_biology_in_focus_ap_edition_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/89610480041.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_off0004e1d3.bin
33ed6a99de6e6c43d3ba6268aa8fffc11285f9902f11115531b9469241fbf241
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1D3 4952 bytes
font_01_sfnt_off0004f2b6.bin
c488bdf34275d839a8335d0276fb628cf0c778bcd60b50a1f030c6442e34779a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2B6 17088 bytes