Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d315514746f78c…

MALICIOUS

PDF

80.0 KB Created: 2020-07-28 01:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a6d0a70249d0cc97705e179a5e593e SHA-1: 93ed2ae47a0dca68467611f37217bf322354793b SHA-256: 60d315514746f78cab965bc2b00725cf4b36047118d52bcb36da787800e256ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, including a known malicious redirector at 'ttraff.com'. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy and paste content into a shell, a common tactic for executing downloaded payloads. While no scripts were directly extracted, the ML classifier and redirector link strongly suggest malicious intent, likely involving the download and execution of a secondary stage.

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.
  • 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
  • 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/pify?keyword=aarch64-+linux-+android-+clang+command+not+found
    • http://files.warriorartsacademy.net/uploads/1/3/1/0/131070841/e4a69f.pdf
    • http://files.mycountyparks.org/uploads/1/3/1/3/131379037/vijerekozot-dajakoxiz.pdf
    • http://files.mauriziobongiovanni.com/uploads/1/3/0/8/130813694/3711ac98.pdf
    • http://files.classicalmusictoday.net/uploads/1/3/1/4/131437878/retip.pdf
    • http://b/62787860
    • http://b/64037266
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/netowezib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/64636610911.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/xefamonikevubug.pdf
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/vuminivujisikosejebi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6244/1637/files/mefowilatexamijenawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2578/files/nowulamosupafivakokewu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/josupigofexonej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57896919986.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/wudafetaluzoweta.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/bipegamevov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/diwoba.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_off0000e877.bin
19280e470845070cb6bc85514870ad914fbfb495608fbcb9e2d80e00ff3a2a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 5352 bytes
font_01_sfnt_off0000fa86.bin
19082bd11e3d1a4d28a8c534b6865b62a2a7e90c4759b3ef4c3071deb0967728		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 17452 bytes

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