Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6749d15f4b396f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-10 11:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a3e156d6b056d4d9a5cee085f8dbba SHA-1: b5ca8e6f6036642982e5eaef7cb2649548547a6d SHA-256: ad6749d15f4b396f831d5837fa83eada09b3e6b8418e6472760476719e438014
150 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.cc'. This indicates a phishing or malware distribution attempt, likely disguised as a course book. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of malicious intent.

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=market+leader+business+english+course+book+pdf
    • http://files.kuzphotography.com/uploads/1/3/0/7/130776483/9521982.pdf
    • http://magox.chicagoforchicagoans.org/uploads/1/3/0/9/130969723/b3aef78f61f.pdf
    • http://files.mrsgalaviz.com/uploads/1/3/2/6/132682829/debukomepemulitaziko.pdf
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/45346279304.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/27132963657.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/mofifasoledoxajumakexibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/mirro_pressure_cooker_parts.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/divubojogilunesum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/fonawulok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/xevesekerijote.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/31773776159.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/dipiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/femogedi.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_off000063d4.bin
fe627b3b21a62126a0ecad77146000ba92233bf76f1d074ef574c2228d9b91cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 5628 bytes
font_01_sfnt_off000076fa.bin
1a3f999bb3aedd13185fba4ab8e82bd92f53305329d5085f40bb33f8b9a5222c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 11080 bytes

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