Malicious PDF — malware analysis report

Static analysis result for SHA-256 065f7a49189dba13…

MALICIOUS

PDF

405.0 KB Created: 2020-08-29 08:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b79b2a4598fc74192c075bd7d3e22ca SHA-1: 22aea366ad0bf250eab7b0cfce9b42cda4530edf SHA-256: 065f7a49189dba13f09f793ab4967a3dd564040b55c7e44dc1c0c5c6095e11e8
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains heuristics indicating it's a malicious redirector link and attempts to lure the user into executing commands, specifically mentioning PowerShell. The document body, though heavily obfuscated, contains a URL that is flagged as malicious. The presence of lures for password recovery and download buttons suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 9

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=mastering+kali+linux+for+advanced+pe
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/45461372180.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/97784047040.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/jijefifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/2630290753.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/vehicle_dynamics_theory_and_application_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_321a160ba6674138a1b9479bc20edcbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe9df4e1fb954b29902d38cc3d2145f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e07387318ce4705b798c2e772f050b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_59314993d6cc4bf49b3ec87b9c1fab23.pdf
    • https://static.usrfiles.com/ugd/b8c837_717b6f1f03f444f89ea18c08a5c03953.pdf
    • https://static.usrfiles.com/ugd/b8c837_25e5364966a24a79aedad58f0850a1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_199c734009f14e2691292fb939ba79cd.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/anatomical_terminology_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/76064011972.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/doxoj.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/mobi_to.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/64866700189.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_off0006034b.bin
d951588dd709a538ba799f789c875eb09c3f54a63c727aef7c07fecdc43227d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6034B 5520 bytes
font_01_sfnt_off00061630.bin
f0a9e5e44f205426e22f95ed8b981043ec99672f373d13a27285cbce9a77bc7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61630 14484 bytes

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