Malicious PDF — malware analysis report

Static analysis result for SHA-256 697cf30771bb63b0…

MALICIOUS

PDF

54.3 KB Created: 2020-09-08 02:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5cc3024e3a736789db047007e995e3c SHA-1: 8e9324859bf098ee830629f4d40507df6980187f SHA-256: 697cf30771bb63b0853f5fc6501bfe8737f12a6592ee1d4790ff54aae7802794
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body text and embedded URL both reference an 'asrb net application form 2019', suggesting a social engineering pretext. The presence of numerous external PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirect.

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=asrb+net+application+form+2019 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c9dbdbcedde34bb9a4827f2800bae987.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7306e_b4cec5abf8e8455ea6a64b7445d6c23c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9d869b_42f8392f6e7f427d8b11724331d5cfd1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_27ef6215578f49a7958091524b247132.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f7815_7600ce1d7ea842d29f2df13e7f61076e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9219f8_04cf7416697443029ac1c4fc839d64b8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01bc73_91af58f845734ca1af0bd1d53158148f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c162b3_c02112b8aa9948d9bba03230f04bfb5a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8cc01_7aec2ea9cb1244aa9ed4dfa2845e2895.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/418e76_1c4c724ed36447499869f14555d7591d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/httpclient_content_type.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/98338484865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/wedavexukul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/girexekituvavavevebe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7931 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off000083c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C0 5560 bytes
SHA-256: 652b2b4055bc2a9c35c7da9869039808c105c825c0f5f01e0eef9f8e732dc583
font_02_sfnt_off00009680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9680 11116 bytes
SHA-256: 443725a17fbe4d2d00562fda868916c98c958cab195792c8725944f0dd219df5
font_03_sfnt_off0000bc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC30 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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