Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fc14bfd87e0ed7…

MALICIOUS

PDF

47.6 KB Created: 2020-09-01 00:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7983af9e5ffd3e029f5e0106aa64ea8 SHA-1: 979a9eeecf2b247fa38ac6aad229dbe3a2d67197 SHA-256: 67fc14bfd87e0ed73432a5fd86169fc4f7d805c2031d552649d43c4beed59f26
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, also contains a URL that leads to this redirector. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious sites.

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/wix?keyword=chintamani+maha+aagman+sohala+2016+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/nuvajelirudemekuzafetan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/34460024855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.pdf
    • https://cdn.shopify.com/s/files/1/0460/9107/5748/files/anvil_studio_2011_free_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/cambridge_igcse_ict_practical_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/g_town_surf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/dumbledore_s_army_soundtrack_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/27856020884.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/34726945336.pdf
    • https://cdn.shopify.com/s/files/1/0429/9787/4851/files/include_unistd._h.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/jatujikamezuzanegumifupep.pdf
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/dazusebetasesenigusebu.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ff3.bin
32888e7cf43d58bc196997e5a528f35ed8a4167be383cc6c23869a9c4a55fe38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF3 5388 bytes
font_01_sfnt_off0000621d.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 3720 bytes
font_02_sfnt_off00006d80.bin
ebae2cff2e454f58dcc0cd21a718bd4daa9fc6f109537c26744d89af475db944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 14264 bytes
font_03_sfnt_off00009a4d.bin
8baae973b126c837996920fe86e1a42096bada6e25e2164a8c27aa53c6c001c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4D 5660 bytes

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