Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94e20cf2f857f8e…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 12:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cf3ea075f3e182f6f184fc00ea119df SHA-1: ef3736bcebc128a3e30e62340546eff451c3e876 SHA-256: d94e20cf2f857f8e9fbd050ffc8bbde6c5cc181d03e53dc9cd8c217f472184bf
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bureaucratie+is+een+inktvis+pdf', which is a strong indicator of malicious intent. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=bureaucratie+is+een+inktvis+pdf
    • http://files.rubinvisalaw.com/uploads/1/3/0/9/130969489/aab28ac773957.pdf
    • http://files.pitchwerks.com/uploads/1/3/0/7/130740044/c2f97fb39b.pdf
    • http://files.ninosfamilyrestaurant.net/uploads/1/3/0/8/130813483/7580011.pdf
    • http://sivebar.felixjarrarmusic.com/uploads/1/3/0/9/130969742/ninevelule.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/18972808533.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/17392681365.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/25167695575.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/99786754868.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0033/files/light_o_rama_forum.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/vapabidakerobusojexovaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/babupazopedosilopekekifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/lisegerobir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/40022884921.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/82410953790.pdf
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/pagaku.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_off00007aa5.bin
103767554fa36449ff49ae10b53da3cd9b5be662a7994e4a8240a80271d23295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA5 5288 bytes
font_01_sfnt_off00008cbf.bin
8ab554ad783cc103281f9a3398f30b9e8b48e75b75c27deedef5c961914eefb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 10888 bytes

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