Malicious PDF — malware analysis report

Static analysis result for SHA-256 965c3ef08011ddd7…

MALICIOUS

PDF

72.9 KB Created: 2020-08-04 09:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a15cf5867a04801549b97cfc8e84b25 SHA-1: ecff450b70051739048c3842aef95d303d93d865 SHA-256: 965c3ef08011ddd7bae6c6411c1a5f2e20429125b48863c3f822e7ddef08cf41
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a link farm designed to distribute malicious PDFs. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=subject+verb+agreement+rules+pdf+oxford', suggesting a lure to a malicious site. The presence of a visual download button further supports a social engineering attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=subject+verb+agreement+rules+pdf+oxford
    • http://files.desertofmyeye.com/uploads/1/3/1/0/131070820/kududigonas_susirox.pdf
    • http://files.jennifervonk.com/uploads/1/3/2/6/132695280/guriwidegedaziv-juxula-mewado-sosinulet.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdf
    • http://files.healingartstherapy.org/uploads/1/3/1/6/131606109/3452600.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/fagotibevorokitubutojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/sifijurob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/30518075770.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83406059157.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/likegugam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/best_reader_and_editor_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/58351421049.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.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_off0000dadb.bin
f19add43300d2addbc700d07a5afd85c287a1c9d13a0c6a78d29735d8bbe96e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 5924 bytes
font_01_sfnt_off0000ef00.bin
da766b3eaff19a2340cd8a7543a8b36b338c433116c427def154d27175af2ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 11648 bytes

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