Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76656357ecd06c2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 20:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc16c22dfe044be3c013d54a6ac476d SHA-1: 71a8a965de042c674c32cd59c4e35a313aca0707 SHA-256: a76656357ecd06c2133a6359b9ccf6951133a101f36c4b72519055519e715b6b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links to external resources, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=atto+notorio+eredi+pdf. This suggests the document's purpose is to redirect the user to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated.

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.com/pify?keyword=atto+notorio+eredi+pdf
    • http://lulobu.extramagicvacations.com/uploads/1/3/1/4/131453301/jerebek-dozuniredugi-namepanevuki.pdf
    • http://gazaj.equestrianpa.com/uploads/1/3/0/9/130969060/dedekegodewutugig.pdf
    • http://files.catfishconstructionllc.com/uploads/1/3/1/8/131871730/vesikij_valaj_pulosejeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6335/2227/files/68637123452.pdf
    • https://cdn.shopify.com/s/files/1/0439/6374/4414/files/43586094351.pdf
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/43315472446.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/zubaxozemikiwutegadiperet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/bizhub_c227_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0552/files/circulatory_system_of_amphioxus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/7075964148.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/lazedamarabaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/wupunuxujibofa.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_off00007859.bin
b4d494a0bd14feb2ec16cd3f346286da527b32f738bf83004cc0150827f9c96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 4604 bytes
font_01_sfnt_off00008810.bin
c314265ec0a3208660cbdb45570ddbc912fa03a5dfc3e10d93c62aa83329ebfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 11372 bytes

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