Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6442f221f755bf…

MALICIOUS

PDF

82.5 KB Created: 2020-09-03 02:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db58248901ffd79af47ec71dff574233 SHA-1: 56570901a0cec8c75889e2512b3d27c6ca018a2f SHA-256: 7e6442f221f755bf918f0b54acf0c162a2cc795a66977e8fe2e915309df71aaf
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious payloads. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to trick the user into visiting this malicious site.

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/wix?keyword=knight+rider+1982+episode+guide
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/dexojejatofura.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4216/files/emulateur_android_pokemon_soleil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/49252229302.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7223/files/854488295.pdf
    • https://static.usrfiles.com/ugd/b88e3d_6165411e0bc0435eaa213ac08dfe1002.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/galejukebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/impersonal_report_structures.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/10225552758.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/zaruwaxomupupazipasup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/52281971784.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/financial_accounting_tools_for_business_decision_making_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/3828540622.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c3.bin
913049f6dc94bced6715675d58afbd008466b6cb863d5105b681ffeec737b088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 5484 bytes
font_01_sfnt_off00011973.bin
558e010d80c864b000323fa243b3ab8ec166fff49651a9aa24c2746bc211dcd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11973 10380 bytes

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