Malicious PDF — malware analysis report

Static analysis result for SHA-256 6971df7519661515…

MALICIOUS

PDF

64.8 KB Created: 2020-08-19 01:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a26f2ea943a0576272f96364d737c3 SHA-1: 00e5940c656f36c20d8f4f994f9169c5a02a287c SHA-256: 6971df7519661515dcced765f1e50b39976db1d68344c965a580c8f802e5ae05
234 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, including a known malicious redirector at 'ttraff.com'. The document body also contains text that attempts to lure the user into executing commands, such as 'curl' and references to copying/pasting into shell contexts. This suggests an attempt to exploit the user's trust to download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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.
  • 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=docker+alpine+apk+add+curl
    • http://kiral.samuelpriven.com/uploads/1/3/1/0/131070387/goxaxazozekanex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5469/2512/files/67484222094.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/59587945998.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/19995263353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/27654700084.pdf
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/daxonujamugikokoxavifon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/94637930698.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/fuwudaxutopujazemawox.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/biteral_ampul.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/bandeya_ringtone_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0435/9654/6216/files/69307805350.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/
    • https://cdn.shopify.com/s/files/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075a2.bin
ab1ff1bd37df47aff0a5fac2df4c834df3284a9bc9d870dc86b53441efa12c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 19172 bytes
font_01_sfnt_off0000b20d.bin
79deb46a5eea3da68a682aed53ba3d9acfc511adc5ec6e343e54e5a9c414223c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB20D 4952 bytes
font_02_sfnt_off0000c2ec.bin
100de27a85de702c2e09b5824ce8b87f81a62460cc126c384f30fc4ebdc1e554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EC 15572 bytes

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