Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa8ce123f67b623…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 14:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6263991d9f4219efad53cb47c37a0694 SHA-1: a9dc433d4c1a1675307c83f9c92d2f439c68d521 SHA-256: 3fa8ce123f67b623c65baeda31d30eb98616e95e1a4a508992cf90a714304477
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a link farm and a specific redirector URL that is known to be malicious. The document body, though heavily obfuscated, contains the malicious URL and references to 'Excel 2016 use chart template', suggesting a lure to trick users into clicking the link. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the presence of a link to known malicious infrastructure.

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=excel+2016+use+chart+template
    • http://files.balloontwistersdcvamd.com/uploads/1/3/0/9/130969375/gipagazovupibiz_tolokaduwimola.pdf
    • http://vuxivisi.seakinglibrary.com/uploads/1/3/2/7/132710780/4788741.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/tixizonetizurujaxitoxobep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/types_of_anemia_and_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7615/files/xumuwasugiretuketewize.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/45456028810.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/sexuwobopelupixuteri.pdf
    • https://cdn.shopify.com/s/files/1/0454/5347/5990/files/the_hobbit_movie_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/49739620325.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/hood_politics_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/siwowopiraboxisikuj.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_off00006c73.bin
2f41b4d87fd6f008b763b789379bad093b924328828d6e6007a60d9ed225e508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 5676 bytes
font_01_sfnt_off00007fa2.bin
7e67d8ed3097016afdab6cc3503c52695705a4009c87ea7f63ccc8c02dbf3ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 10280 bytes

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