Malicious PDF — malware analysis report

Static analysis result for SHA-256 075517eb02c6e868…

MALICIOUS

PDF

36.1 KB Created: 2020-07-10 22:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: cde6344d97ac65fae69452dc3f3d5357 SHA-1: 378041ae3efe18768818bdbc6a07629063193132 SHA-256: 075517eb02c6e86825c4eada47c0973b9246326518e5e30d3624291af155f05d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that appears to be part of a link farm designed to drive traffic to malicious sites.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=conflict%20resolution%20worksheets%20for%20high%20school In PDF document text
    • http://files.cccinspire.com/uploads/1/3/1/3/131383977/8a7a801a5c.pdfIn PDF document text
    • http://files.doulaabilene.com/uploads/1/3/0/7/130775511/jenufid-furodejuxaj-vogamopusoxesaw-pemav.pdfIn PDF document text
    • http://files.miamfoundation.com/uploads/1/3/1/4/131408353/lovilosufululixona.pdfIn PDF document text
    • http://files.jamesesouthern.com/uploads/1/3/1/3/131381722/2751027.pdfIn PDF document text
    • http://files.northwestpetroleum.com/uploads/1/3/2/8/132814123/17065ea.pdfIn PDF document text
    • http://files.sidusnova.com/uploads/1/3/1/1/131163854/logowuzukabazim-tefesomegivose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sokoratu.files.wordpress.com/2020/07/marabezozotitofan.pdfIn PDF document text
    • https://jejedikelul.files.wordpress.com/2020/06/79119247566.pdfIn PDF document text
    • https://zeninel.files.wordpress.com/2020/06/mabupojukilux.pdfIn PDF document text
    • https://minuboge.files.wordpress.com/2020/06/60275076827.pdfIn PDF document text
    • https://lesinunuboj467322680.files.wordpress.com/2020/06/logavabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5244 4996 bytes
SHA-256: 71cc8aa8eff39c99e36feb197dcf78c3d03f67db72f4abe3b9cd8beac9cbf573
font_01_sfnt_off00006350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6350 9416 bytes
SHA-256: 747971205b68a71368bf2012b90f1376fbca60af51d288cfedfb698c91164a4c

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