Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2195af3f4487cee…

MALICIOUS

PDF

36.3 KB Created: 2020-09-19 13:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 147759fe186764a7d9349dcc09db6d12 SHA-1: 1fa30ad89cf84e5e480e4545112c792eb869224c SHA-256: e2195af3f4487ceeb49c1feaff888e6d125f1e106bad5de672bdbdc270748f8f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding. The presence of a link farm further supports the malicious intent of directing users to external, potentially harmful 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.club/wix?keyword=force+diagrams+worksheet+tes
    • https://0bf9b3d9-25a1-49ac-a304-dc8c65148185.filesusr.com/ugd/daca0d_d7f0d76aee0c412db748f89285e1e0ea.pdf?index=true
    • https://9844b9ef-72c9-4477-b6a0-43982dd0ad37.filesusr.com/ugd/cdb50c_09e049548c294456a70f20871f4ffe6c.pdf?index=true
    • https://fc33a888-9fb9-467b-8f53-8ff4d86ec9ca.filesusr.com/ugd/07ef24_93c92566d2b34358a759106896f69b31.pdf?index=true
    • https://7eaf5882-95fc-469c-9609-be2e4336923b.filesusr.com/ugd/4a2613_8d8b1db063944f5283800192c57ed90b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/weralenerarer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/kovoxilufotel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/sunopugino.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/43348518821.pdf
    • https://cdn.shopify.com/s/files/1/0437/6910/2485/files/cursive_name_handwriting_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0276/files/convert_arabic_to_word_document_online.pdf
    • https://513516e2-9a38-4e52-a515-1892be70dc6c.filesusr.com/ugd/d5415a_b2acdde5c0f341a7ae246fefc447028e.pdf?index=true
    • https://5ef8a4c3-d6f4-4901-b19f-6fe229df2cef.filesusr.com/ugd/21e9e0_c25a994ed2a1445b982f0e3bdf5a44c6.pdf?index=true
    • https://1df2da18-3db1-4e2e-8846-856216151b46.filesusr.com/ugd/a42eed_199ad8f997504db2955556c44559e390.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004441.bin
47cddb1af9a792eb333922eba80c22918848de60948263b2024eea7cec43e3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4441 5112 bytes
font_01_sfnt_off000055bb.bin
bed20a9a7928f57c305570f548e3c4f9d507eebac8f99bef7107e580805ce704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BB 9608 bytes
font_02_sfnt_off00007665.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 4324 bytes

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