Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d507ecbe88bd93c…

MALICIOUS

PDF

60.4 KB Created: 2020-09-02 06:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd7c6729fbc5b793637d9d7daada95b6 SHA-1: df9cc1f96659bff23ff7349eeb43c1b3efdc84f7 SHA-256: 5d507ecbe88bd93c3c93f430040de9ad5225335f52b973c4bde63f8716dc5598
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body also contains the URL 'https://ttraff.link/pify?keyword=certified+bookkeeper+exam+study+guide', which is flagged as malicious. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/pify?keyword=certified+bookkeeper+exam+study+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/66883735758.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/losufugufonaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/99428571144.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6530/files/16024792480.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/63162871539.pdf
    • https://static.usrfiles.com/ugd/efb3f0_32739c91955545e488ac56d0be280f60.pdf
    • https://static.usrfiles.com/ugd/b8c837_c50174c56f114363ba13c083e23cefd2.pdf
    • https://static.usrfiles.com/ugd/7c30af_167b31a7cfe24720be1b5ddc34895b9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e09d8b6de35499d85ff50e2c54497e0.pdf
    • https://static.usrfiles.com/ugd/d01287_470d63cadccc440b8e9101d91106b47a.pdf
    • https://static.usrfiles.com/ugd/0c4177_c81c811ab4e84f749d922fec774ec636.pdf
    • https://static.usrfiles.com/ugd/8b2c09_07291b59426646a494e4bf7191ef2b1a.pdf
    • https://static.usrfiles.com/ugd/29c71c_f1105d8cade440c9aba8ff95fd485b42.pdf
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/35990952780.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/xejuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/meerdere_bestanden_samenvoegen_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/57417892625.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_off0000adc2.bin
92ae0dbe1d9469d813ea096168c68359570610250fe498c1d9ad46671c1e4e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC2 5608 bytes
font_01_sfnt_off0000c0ce.bin
8ebe2272f5a6342e5b9ad0cacab74528c92fa80c549bbe47f354fc864ffcea53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 10248 bytes

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