Malicious PDF — malware analysis report

Static analysis result for SHA-256 303e2659e49e8481…

MALICIOUS

PDF

40.0 KB Created: 2020-08-11 21:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf60dee9275e4ca4c0d8b3f67dd03061 SHA-1: 36a886e6d0b5af2d28c96ac48816da5773f521a2 SHA-256: 303e2659e49e8481427c52fdf9cc6ada211a008441ac058442d3f1981db6ef92
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, masquerading as a 'counselling skills book pdf'. This is further supported by heuristics indicating a malicious redirector and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=counselling+skills+book+pdf, which is likely used to deliver a secondary payload.

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=counselling+skills+book+pdf
    • http://files.trinity-arc.com/uploads/1/3/0/9/130969059/jexaveg.pdf
    • http://files.amyharpercoaching.com/uploads/1/3/0/7/130739991/122067.pdf
    • http://files.wicknscents.com/uploads/1/3/1/4/131438471/nuwegutavejuv.pdf
    • http://faneboja.hickoryridgeowls.org/uploads/1/3/1/3/131398020/5818921.pdf
    • http://fevirodi.workinnvision.com/uploads/1/3/0/8/130813528/runipimol-muzegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/fofunazuzute.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdf
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/fudijuwepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/35306308549.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/23189660125.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/62130186102.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/wobowawimimafobopaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/lomixulanurewuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/doluvorugotevavojajaj.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_off000060b3.bin
5f6f4c7a3f21640f28d9b96dcdb19a204a6204094a8a18e7c12e604bf879aefd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5012 bytes
font_01_sfnt_off000071d4.bin
6fbb3f0cbb16e3558190d772fda3b5d674e0a5d1e82d289124899e5e65cab05d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 9788 bytes

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