Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7ecb90351f53f3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 07:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59dd4a4c4bf20bf30be223526b6a509 SHA-1: 290d0ac7d41727afc210dd22648c149b1fe3dc30 SHA-256: da7ecb90351f53f3c70b956671b6425712ef59b04fa8b11ac2920ba4d286060c
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and links to a known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'climate change', likely to disguise the malicious intent. The primary malicious URL is https://ttraff.com/pify?keyword=ensayo+sobre+cambio+climatico+pdf, which is designed to redirect the user to further malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve SEO for malicious content.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=ensayo+sobre+cambio+climatico+pdf
    • http://files.ptwmlc.com/uploads/1/3/0/7/130740017/7d6f36908e315.pdf
    • http://files.collinsfamilyhomestead.com/uploads/1/3/0/7/130738801/zeragokutax.pdf
    • http://files.3dfurniture3d.com/uploads/1/3/1/4/131453054/8222489.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/adinkra_symbols_and_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/kogezufezexovedibuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/91809534914.pdf
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/christmas_music_flute.pdf
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/soccer_drills_for_u8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/morphology_and_ultrastructure_of_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/nujafezo.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_off00006e97.bin
e152f7b0a85b2d13f5e03d28396699f394f845987abdaa4c31ba179ed14c7c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 5500 bytes
font_01_sfnt_off00008134.bin
47e4e29fa1a8f678f0b0892f97e64c1b6b99e0a4eb80187bd64c6236bc47eaa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 11004 bytes

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