Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fc48815a68cf91…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 18:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e5260a7f00fd41597bfcb2b04cc675 SHA-1: 5309027967d46507956dd34631f08fe58172a9ef SHA-256: d8fc48815a68cf91cb43f909c98b64cf9887bb26f5124d02ba9d5b1ed4984b71
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a FedEx shipping report. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector is likely social engineering via a lure document.

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.ru/pify?keyword=fedex+ship+manager+end+of+day+report
    • http://files.merrymeetingartscenter.org/uploads/1/3/0/7/130775232/tejorojubogugoto.pdf
    • http://kasirejob.stephaniepercydoula.com/uploads/1/3/1/4/131453540/8731653.pdf
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/luzigipagezazivadaropa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/tanimegigibunofebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/ipa_transcription_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/8566/8255/files/gizudodebalofomimirofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/79920994062.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/77318984278.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/vuwowosijadaximudageliz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0994/files/civ_cardiologia_pediatrica.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/67529253601.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/vuwibabemifoperugofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/xinutex.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_off00005e1a.bin
8f9dc7150a7248b30e46f50c7c8d409f2266d0f95c81aafd82bc1f694b5dcc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1A 5548 bytes
font_01_sfnt_off000070e7.bin
df8a7cdb1cf1ea77430629c0c9ab9ec2158c5d341cf3437383f47034fd549a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E7 10312 bytes

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