Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e07f00a218b020…

MALICIOUS

PDF

34.1 KB Created: 2020-09-02 07:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f92e1794def055b531851ae054b70ee4 SHA-1: dd96002ec4a1f1e3abc79962ea8facd6113523cd SHA-256: 74e07f00a218b020646bda775db2e2f2bfabdd65e85fad693d38186ce25b81bf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, masquerading as a resource for educational materials, which ultimately redirect to a malicious URL. This behavior is indicative of a link farm or phishing lure designed to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wix?keyword=free+printable+handwriting+sheets+ks1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/74a852_f229f2ace5214e5a88d5f1752d2f4169.pdf
    • https://static.usrfiles.com/ugd/f14cf6_4ed9b9e94f0e47619ab35c72e67aee07.pdf
    • https://static.usrfiles.com/ugd/b8c837_54acd1b4359e40bab030e4b644c34145.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/90159480685.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/mr_coffee_keurig_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/vubupit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/45184851170.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6902/files/catabolism_of_fatty_acids.pdf
    • https://static.usrfiles.com/ugd/2ca22b_50e28711176241ee9bb61567a175a186.pdf
    • https://static.usrfiles.com/ugd/590778_7c1f9c2249e04a36b91141bbf3ec2abe.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_off000046d5.bin
ba0e57c15b4cf983cc9c2bb4c3a02d7e038e131fe1cb05455bdfbb8f1424372b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D5 5524 bytes
font_01_sfnt_off000059a1.bin
0cb22c1243879b6c713de6c950c9e027ef1db430651c86b10064c468c2d144af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A1 9968 bytes

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