Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7e668998fffc28…

MALICIOUS

PDF

57.3 KB Created: 2020-08-03 14:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc5410d2ba376a9df9592b2d9f5cd182 SHA-1: 376da649452de38eb3341b386603d9cf233f1d16 SHA-256: ea7e668998fffc28b849f9db8205e4c7c93554d3668bb5d2b79795904b0423c8
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text referencing 'aircraft structures and systems pdf' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of multiple links to external PDFs, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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.com/wb?keyword=aircraft%20structures%20and%20systems%20pdf
    • http://files.christchurchware.co.uk/uploads/1/3/2/7/132710565/954486b86bee.pdf
    • http://xasax.kokopelliu.org/uploads/1/3/1/4/131438137/begolu-jizixig-notap-mizadalibap.pdf
    • http://files.newartbycjepps.com/uploads/1/3/2/6/132683000/jumuwusobeviluw.pdf
    • http://files.tammymclain.com/uploads/1/3/1/8/131858045/verafofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/41727362126.pdf
    • https://cdn.shopify.com/s/files/1/0431/7433/0517/files/gutuzifirivibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/dupanilamarigejujasutew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/38759743061.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/zisuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/dizupazixug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/zufejixugenasibudaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/kefejuwefarada.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/ginunilelujozobotas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/jomuxolexujup.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/simpsons_game_of_thrones.pdf
    • https://cdn.shopify.com/s/files/1/0440/0958/6853/files/66590591351.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/guzojosogolonevofizizixu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/13211864537.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_off00009b24.bin
33154777ff81514f3272831c658ed33e5c5b2069416753722d0037ef74b80247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B24 5360 bytes
font_01_sfnt_off0000ad54.bin
740acedede7777411ab0a2e6df4837550fab85abf5019d0204282f612033b19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD54 13728 bytes

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