Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feaa617730f5645…

MALICIOUS

PDF

48.2 KB Created: 2020-10-31 07:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98df44a2cf73be874872afa62e7c5ece SHA-1: 9d40d7a93b2c2bf1bde3075c2c93f5f50fb9a3d2 SHA-256: 8feaa617730f56455fa53f667891f3cc0df6300e480208f78b9791d20b331a45
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, including one pointing to known malicious redirector infrastructure. It also exhibits characteristics of a link farm and includes a QR code lure, suggesting an attempt to redirect users to malicious sites. The presence of a password archive lure indicates a common tactic to bypass gateway security for subsequent payloads.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?keyword=computerized+library+system+definition In PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/suzidowi.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/zinufujimef-kaxavopovabule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f8af4d6cf1c9.pdfIn PDF document text
    • https://wavutokemik.weebly.com/uploads/1/3/4/3/134309613/refefanowox-bikuxudavopumep.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5518039.pdfIn 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://s3.amazonaws.com/pivetuzadujo/maxwell_equations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7757/3040/files/enter_password_for_credential_storage_vpn_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6644/8808/files/46881714060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9205/9314/files/13828369227.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/yo_amo_los_zapatos_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/lebikudobap.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/reproduccion_de_angiospermas_y_gimnospermas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3808/0668/files/49057437538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4475/1528/files/download_gcam_mod_apk_nougat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 5384 bytes
SHA-256: 6d56c63d17dab55d5bd4f1170f53896a0a29f27b615d2cb7a57226b3322a628f
font_01_sfnt_off00007f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 11408 bytes
SHA-256: febe7e4cc7b5d7d37cebf07e7809f45f8c591509cbdc7951ed5c87f96feb33a1
font_02_sfnt_off0000a57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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