Malicious PDF — malware analysis report

Static analysis result for SHA-256 147622fc767999df…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 13:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c926572f1b94ef827005c1a609be4dd0 SHA-1: e2b9224bd10fff9db63150b92e3bf53454b37626 SHA-256: 147622fc767999dfdad02b2c5b7226289e993186b0910d9f633a52680aacfa74
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised with a lure for popular media downloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=the+spongebob+movie+sponge+out+of+water+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ce0e6d_1e2023dc380840a094625bffee0c4161.pdf
    • https://static.usrfiles.com/ugd/f515ca_f7441a60bd434a82b93097c5c1315475.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e034a549c214af7834858400ab585ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f1014a505f41c78a230d1c308fe998.pdf
    • https://static.usrfiles.com/ugd/b7306e_896c7e4672e7453c93b7cbcbbbe00e18.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/gulezujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7151/files/design_thinking_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/baccho_ki_photo_karni_hai.pdf
    • https://static.usrfiles.com/ugd/b8c837_9acca036a7634141a618435d16eda40c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7378adc4b584a5d90ec85cc30d9aa8b.pdf
    • https://static.usrfiles.com/ugd/a18aa6_e3d836600c6647fba6ce2b62ad766b03.pdf
    • https://static.usrfiles.com/ugd/824332_0e14f6509a0b4cf994d3f4f4d427230f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22cdb9f5e104815a60ba5cfedbbd167.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/muxorabuzafafubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/99946722331.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/mafukakoxab.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b13.bin
af34fc3949ea18f4301bec226a5df28b33eacbd5a86dd9fac35537632f552866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 5696 bytes
font_01_sfnt_off00007e56.bin
58b7dca105b3914ba05cea0e9c6011d08fc1fa9be608a395293fda14592e513a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 10648 bytes

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