Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db966aa898446f3…

MALICIOUS

PDF

44.5 KB Created: 2020-09-04 07:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 749e5d7432f4077e141973577dfee411 SHA-1: 64350528496eec99092672d0fc631e0ea26c5d95 SHA-256: 5db966aa898446f308e0fff3765a0c6169b99067a42a0212a4807348299f7297
194 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that attempts to trick the user into clicking a link to view content, which is a common social engineering tactic. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary link leads to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for further payload delivery or phishing.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=android+emulator+for+pc+nox+app+player
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/14741958327.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/zeroxiludufatozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/96786599494.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/idaho_chukar_hunting_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/zuzidomanusenuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/83407359858.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/kugawetewubosuvodewivuxa.pdf
    • https://cdn.shopify.com/s/files/1/0464/8747/0248/files/saxopim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/vamiputajujalexozupufokuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/bopibubevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/bsa_medical_forms_a_b_c.pdf
    • https://static.usrfiles.com/ugd/bf0735_0fa687858d444c888f51ad09dd5ed10c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f959deedbb14b019a9f5874d875d645.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca6f42af8504f15a09752679f7346c2.pdf
    • https://static.usrfiles.com/ugd/3f0e57_00b33832c7a24639bd6d27f91df8d4ac.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_off00006f5b.bin
bdc4eccba3a30f25f2db9a504e1fa6bb97b50641601b654800407fdb571c5986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5B 5284 bytes
font_01_sfnt_off0000814d.bin
bfe244f38eee4965d680cd375c25ddca0e84ba081004c15948946337e8b17344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 10424 bytes

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