Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b5fa06ef224cd…

MALICIOUS

PDF

59.8 KB Created: 2020-08-11 16:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5097d08c800dd8d255e3454a09e2ada SHA-1: 00f9312946dff61e30bf18fbad50abef1c4d40d6 SHA-256: 453b5fa06ef224cd4d351a3edbd111f2f203caf1aa504659edeba7e4dad5de72
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting a lure to download further content or visit a malicious site. The document body, though corrupted, contains text related to a 'maths guide' and the malicious URL, indicating a social engineering attempt. The presence of numerous external links, many hosted on Shopify, points to a link farm used for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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 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.cc/pify?keyword=10th+new+maths+guide+2020+to+2020+pdf
    • http://files.nowwwriters.ca/uploads/1/3/1/8/131856757/resunifoke.pdf
    • http://nixipu.beautyandthebean.net/uploads/1/3/0/9/130969077/8281523.pdf
    • http://files.fullerthanlife.com/uploads/1/3/1/4/131407493/6575504.pdf
    • http://gabibaduj.petoskeynorthmenmath.com/uploads/1/3/0/8/130813528/bagedije.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/rawipiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/takobegakiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/48316200320.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/78330575637.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/muzukifidugafumorug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/wopebodawumala.pdf
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/cosatto_zoomi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/degopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/easy_classical_guitar_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/0455/1590/files/buvutijudobepefowuwusi.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_off00009c43.bin
01792d702f3279de37933101acde5eafa824cf9c409b04fd4c07d29e83f00148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C43 5648 bytes
font_01_sfnt_off0000af6b.bin
2b17cdd217dad65d70c8074aff9da89bef1f3ed1eaea2d68886872390ef4c6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6B 16216 bytes

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