Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1f3b170a12bc36…

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 05:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 224bfb628c68ef4c90358358b5b76d1d SHA-1: afbeec43f5cca27417430fe9a42dcd53b60d4b93 SHA-256: dd1f3b170a12bc36997974aca9901e28fabf393bba43ba5a3d480e05bbd2fa1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to exercises and agendas, and prominently features the malicious redirector URL and several Shopify URLs. The ML classifier strongly indicated maliciousness. The presence of numerous links suggests an attempt to drive traffic to malicious infrastructure, potentially for SEO spam or phishing.

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.link/wix?keyword=must+have+to+should+exercises+agenda
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/dutosixigojimakixaliju.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/bixuvexolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/gowawo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/react_js_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/visaboxe.pdf
    • https://static.usrfiles.com/ugd/e42ee3_7a5a031bacc74c4eaeca5f6d96c946c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6e395da909d4f9487d23b56e0f9ceef.pdf
    • https://static.usrfiles.com/ugd/3aca14_70cf37d1892043bebd9e898930578fa1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1973744e4844790b9d1f559f1a097b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_155f005baacd4690a738d3a607fe220a.pdf
    • https://static.usrfiles.com/ugd/36f25b_3dfd62a69b6c4506b18dacf411ff91df.pdf
    • https://static.usrfiles.com/ugd/93c935_f667f13238b640e7bf96fbaf168f5f3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d9617a8c86423a9f1b3d48f3c18a84.pdf
    • https://static.usrfiles.com/ugd/edb4a7_e560940b7c064ac5bf641767092455c6.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_off00004d28.bin
1c7494c337599bd4cc1982a5dbe6ec30498768e3d6b40372806557fa0ee49ee4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D28 5336 bytes
font_01_sfnt_off00005f56.bin
ba15cd63ca2bd8d13ba802c124014a871380a22390cec91a72157e17e9247ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 9852 bytes