Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed405996574b781…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 15:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec54e7b5e891291676af9d32f3acc3d3 SHA-1: 50373f7d21e30e090ee1abc815e957d8277c197e SHA-256: 3ed405996574b781dcc7a720231d41e90536c4e40ace132aa97737d9453dc486
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, includes the text 'Inductive approach qualitative data analysis' and the URL 'https://ttraff.cc/wix?keyword=inductive+approach+qualitative+data+analysis', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness. The presence of numerous external links, as noted by 'PDF_SEO_LINK_FARM', further supports a malicious intent to redirect users.

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.cc/wix?keyword=inductive+approach+qualitative+data+analysis
    • https://static.usrfiles.com/ugd/b8c837_d9aab21f70fa4322b84a1021d7e39212.pdf
    • https://static.usrfiles.com/ugd/b5472a_23856b66a95c4b94a55de769389b57b1.pdf
    • https://static.usrfiles.com/ugd/99965f_a1b122a052a54337b6e0055e470095be.pdf
    • https://static.usrfiles.com/ugd/90423f_2f13372778d34cc78d806925816a15eb.pdf
    • https://static.usrfiles.com/ugd/913720_c0bce25498a446209c789668fa9df7be.pdf
    • https://cdn.shopify.com/s/files/1/0429/9833/3599/files/ap_biology_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/dovasuziwenodomadojiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/narasimha_karumanchi_data_structures_book.pdf
    • https://cdn.shopify.com/s/files/1/0463/0321/5778/files/piscine_42_day_10.pdf
    • https://static.usrfiles.com/ugd/b8c837_4263e917e5ab430bbce7e8548f6d2abe.pdf
    • https://static.usrfiles.com/ugd/b98abb_16722943fe2c4b37918b4f848fb20850.pdf
    • https://static.usrfiles.com/ugd/a44510_ada965ae78dc4926afcdece0820ce058.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/pdf_to_word_converter_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/mazilamirazamipurotuvux.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/xojutakijilewatav.pdf
    • https://cdn.shopify.com/s/files/1/0464/9127/1320/files/najoni.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_off0000812e.bin
4d6b0e210a7eb087166184e5a57a8def1a889775345940ac8ca6ed64e90a407e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 5384 bytes
font_01_sfnt_off00009379.bin
80581408d5b5487b6852656019be0c6ed0be60ed06a26a6bf81769dd4dfde6b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9379 10676 bytes

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