Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e311896c0d7629…

MALICIOUS

PDF

42.5 KB Created: 2020-08-21 07:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd72e67795dc4f8efdb06621eb82687 SHA-1: cfcf27a4ac58730b5acb54aae62d55dfefde8457 SHA-256: 39e311896c0d76299cf6e1c11eb7ac0b19675894211e2f80db1ca08e4acd758b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring users to a malicious site via a deceptive link.

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=android+studio+color+code+white
    • http://files.lifebeginsafter50.shop/uploads/1/3/0/8/130874067/saluva.pdf
    • http://files.dreaddecks.com/uploads/1/3/1/4/131437158/9954007.pdf
    • https://cdn.shopify.com/s/files/1/0440/1889/2965/files/rorowa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/7th_grade_springboard_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0448/1181/3015/files/fofudozanibujobuxuresi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/52968179478.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/38438870342.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/69983227053.pdf
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/filipino_christmas_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/qualities_of_good_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/77195897674.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.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_off0000682b.bin
71ebf07371254c2e5bdf7b701a5deea51df53f662fb9a15f96fbcad1f2562cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682B 4896 bytes
font_01_sfnt_off000078d7.bin
9c94bef6dfa8a459e59946f4c398d1b8bce1420ddd4d706e8c20da6b55a59b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 10740 bytes

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