Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c06e62c6a4ab4e6…

MALICIOUS

PDF

70.7 KB Created: 2020-09-03 01:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1e72cce5f6d769fa9a0d882d1138ad SHA-1: 239385f4a6fda17ce695f842244e23dc22a9eaee SHA-256: 5c06e62c6a4ab4e64acf389c62fe9c4a931d1e3924f67ef85d12f113942e1e90
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/pify?keyword=rcog+guidelines+for+antenatal+corticosteroids. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an attempt to trick the user into clicking it. No scripts were extracted, but the presence of malicious redirectors and link farming indicates a phishing or scam attempt.

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.me/pify?keyword=rcog+guidelines+for+antenatal+corticosteroids
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/xepolutazunamiwimigitito.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/admiral_insurance_company_claims_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/99775735980.pdf
    • https://static.usrfiles.com/ugd/74a852_b0883a57afa844ef821f60cb4080aa20.pdf
    • https://static.usrfiles.com/ugd/8127dd_eb9a8ebcfa73409ebc88d679613eb3b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b6363682b9d43918f92aa7bb1a236d0.pdf
    • https://static.usrfiles.com/ugd/3f80ec_675eefaa30e5462c91ac733df92a9dfe.pdf
    • https://static.usrfiles.com/ugd/b56239_46960216f63743fe9aefa3a8631f109b.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ae035b272045479be49a6e15ce87e1.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_b1a9ed78551745f9b471f6e31907dbbb.pdf
    • https://static.usrfiles.com/ugd/0e6328_28bfe4c124b04130b88e4a2d38a51dcd.pdf
    • https://static.usrfiles.com/ugd/50de67_42847dd0055e4410ba7e950f073ad75d.pdf
    • https://static.usrfiles.com/ugd/de02f3_3d59a67ceba74c118b3e3ee8c4649af2.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_off0000d672.bin
6eb6a0c99521d0fe9aab396efcde25b0631ea246d83320a6a6ac911b953414ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 5196 bytes
font_01_sfnt_off0000e834.bin
fbfa877644a0e8aa58649a915f11dea124af70a865bb50fdf27650c64091ca54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 11328 bytes

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