Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d471eb276a97da…

MALICIOUS

PDF

50.4 KB Created: 2020-09-17 23:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c96d48ed476423425ae2dd846c0a0ff SHA-1: 0a04134a0e795c3d0ecc1ee0e03f09ad3774d7ec SHA-256: 35d471eb276a97da51c7940c8965e2e4908cd4e5b2c9ebdd7a06b7375a499d93
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, https://ttraff.me/wix?keyword=section+4.2+identifying+minerals+answer+key, is flagged as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to an 'answer key'. The presence of numerous links and the malicious redirector indicate a phishing or malware distribution attempt.

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.me/wix?keyword=section+4.2+identifying+minerals+answer+key
    • http://files.malvinalaudicina.com/uploads/1/3/0/7/130738971/gudunawupabaze-vuvibifavegu.pdf
    • http://files.acemgaming.com/uploads/1/3/0/9/130969045/roxej.pdf
    • https://79e7712a-bc12-4343-ac7e-3d20e0313f9d.filesusr.com/ugd/d31907_436b19a1918941a4bba9d55637473b70.pdf?index=true
    • https://7e4b1efc-eb0b-44a6-8760-a6981ae45dce.filesusr.com/ugd/b52961_2f241c8a2dff4d80a4982af3fe421245.pdf?index=true
    • https://c6a863d4-73f7-4319-9e51-86af52113b91.filesusr.com/ugd/6203b9_96061ec82698408c8dc5bd18db67611a.pdf?index=true
    • https://1d0f70f3-5a40-4df4-8e53-9c70ef78fa6b.filesusr.com/ugd/479fa9_bc715a7d8c5b418398927edee1317415.pdf?index=true
    • https://4a074a03-8628-4d4d-9513-8cabea366944.filesusr.com/ugd/0b46e6_8c8c0b11a81c4f4e897fdd8cb3846078.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/4877/1477/files/rabixevakuxokavakulaliwaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/69965771862.pdf
    • https://cdn.shopify.com/s/files/1/0466/2840/5413/files/guns_n_roses_estranged_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/how_the_mind_works.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/behringer_headphone_amp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/k7_antivirus_software_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/vuwudupu.pdf
    • https://cdn.shopify.com/s/files/1/0482/0372/7000/files/renoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/lorudo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008578.bin
e0e7b516165728480a721d1baad3a4ed983ceb08b77d0e3d7421fa92179bc268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8578 5952 bytes
font_01_sfnt_off000099d7.bin
001f8f00f29b1d929b456681cfedaebfde5182fcdfe094710fd2e162d6b32a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D7 10148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.