Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b454b7357f619f…

MALICIOUS

PDF

48.8 KB Created: 2020-09-19 14:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cb74be403fa8f5012bc5dbf967b461c SHA-1: f47b173836769a5cdd5469ae2e367bf47b8a67f2 SHA-256: a7b454b7357f619f8bce61202616e101c7463fe0cadd0dcfbe06c7cd12c4222d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.me/wix?keyword=readicide+chapter+1+pdf. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=readicide+chapter+1+pdf
    • http://files.randytaylorweddings.com/uploads/1/3/1/6/131637306/fatutava-wemijuf-lanabupolun-nepirupunipazo.pdf
    • http://files.studio43vxr.com/uploads/1/3/1/4/131407406/fewazejapovobevawu.pdf
    • http://befik.gatewayeagles.org/uploads/1/3/1/1/131164250/bcf3d2998c11f5.pdf
    • https://4e32b72e-571d-46a5-8870-762c28e0a38c.filesusr.com/ugd/682d1c_da6c52a22b844a45a9f9244b8f743f54.pdf?index=true
    • https://c15eda05-006b-4321-aaa9-86ed63ce10c9.filesusr.com/ugd/33a16d_bd2a669eec3e49d5a70341892ffb9f67.pdf?index=true
    • https://c6091fb0-81ca-4279-aed0-0b0f8e3ac93e.filesusr.com/ugd/3be48b_87363d1a7e2a43149a7ad1891f8a74cc.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/cid_old_movie_all_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/aluminum_sheets_canada.pdf
    • https://cdn.shopify.com/s/files/1/0434/9660/3814/files/final_countdown_trombone_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/collaboration_diagram_in_uml.pdf
    • https://cdn.shopify.com/s/files/1/0432/5441/5515/files/84612025173.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/dibogamaduluxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/78676362549.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/2008_scion_tc_owners_manual.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_off000081f1.bin
4c078d3590e77c62e74504dd9a687f8b64db23da79ce964c3b9a96e1bb25247a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 5092 bytes
font_01_sfnt_off0000934c.bin
aa2b50c3ffaf1170afcdc753289fc45eb389962a0573f245cf0cc29c717aa261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934C 10256 bytes

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