Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cd33b1ef93f4bd…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 20:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f340f38aaa18bcfd2ce38232be0c2c19 SHA-1: 99f5da728743f4ab84c97b9daba605a3f2146ed1 SHA-256: 62cd33b1ef93f4bd250ee09f2ab3f4d18ff14ce75d627fbc3b5ae1b9bc0818e4
182 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a download for 'Wondershare Filmora effects pack'. The document also features a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The presence of a download button lure and callback lure heuristics further support a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/wix?keyword=wondershare+filmora+effects+pack+dow
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f3cddb0cad2f4dfdb061d0873098eabd.pdf
    • https://static.usrfiles.com/ugd/756799_b7dff96c75d4448d9d14b5756c395010.pdf
    • https://static.usrfiles.com/ugd/b8c837_01d9be52db3f48eb85dce203f68a2ad5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e46784d0e14422c82fdf6e6567ef99a.pdf
    • https://static.usrfiles.com/ugd/b8c837_08b7e61acb7943a58bb4d15be473e1be.pdf
    • https://static.usrfiles.com/ugd/739437_f9fe7e4f00c74151a3d51fbda0ce41ed.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/buliwat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/cbic_exam_secrets_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/muliveselumikeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/mind_on_statistics_5th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/68257336233.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dc7f39e312144e18ce24ed2f66e7f4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fc8fa00ffa9422d9573937e99067c4f.pdf
    • https://static.usrfiles.com/ugd/d94ae5_34ee16442d104950a5d1eddfac710ae1.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_off00006e7d.bin
b7ac2051d01173f5607dfdd09ab78b8c3b00f6cf4125d390b11eae72342d7d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 5564 bytes
font_01_sfnt_off00008157.bin
043a15f600292d803cc596b55535dd88cf5409746781634007a3390d4847a434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8157 14656 bytes

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