Malicious PDF — malware analysis report

Static analysis result for SHA-256 9181d27d3650f826…

MALICIOUS

PDF

58.0 KB Created: 2020-08-11 12:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bced15e5f5823913232b79d191244cc7 SHA-1: 302f347d3d2ee2341a43a1ab21a49b6c42dc007c SHA-256: 9181d27d3650f82638f9e2e2d4d9f2ba638cc6e2f0982dae878f4ee83718d4df
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=bronchiectasis+review+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure.

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=bronchiectasis+review+pdf
    • http://mejezep.hawleylutheran.org/uploads/1/3/2/8/132814930/wukekevatezudup-lopelafosos.pdf
    • http://wunakita.paulberryhillsgallery.studio/uploads/1/3/0/9/130968996/882d6ff71.pdf
    • http://pofexox.forestfreshproducts.com/uploads/1/3/1/1/131164250/gefututexodevo_nozawomot.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/sunuzesawajeliwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7175/files/vudurufijumuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/crisis_stone_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/dumagidexazexazugifusiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/8473600249.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0215/files/37448912545.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/dowug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/16288176224.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/atm_cmachine_new_balance_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/partnership_deed_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/rugakagapugubosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/vapegewosugagofebe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/72747461455.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_off0000a5a5.bin
24ce33e603d2fb658b1d8300db047877999d67064743a51c7400907cc88d39ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A5 5412 bytes
font_01_sfnt_off0000b815.bin
10adb415a27523eb03eb9599023a8e65c5ac1ed90ecc34337481f0ef1fef6b79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB815 10208 bytes

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