Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7212ddf76e8285…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 00:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9105d0e6fd0571d39a2516baf95a24 SHA-1: 49844d5a4090f04d2debf0adf3866b036c185d7d SHA-256: fe7212ddf76e8285967742d833ea9a167301ddc91016421d582198c728e1d1de
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=aadat+punjabi+song++video', which is likely used for redirection. The document body contains garbled text along with some of the URLs, suggesting it's not intended for legitimate user consumption but rather for SEO manipulation or as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aadat+punjabi+song++video
    • http://wonesasit.jorricmatthews.com/uploads/1/3/2/3/132302780/c8e55b1c.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/67556911403.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/donutamevadadoxugezej.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/25511398507.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/zetod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/19377471115.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/ferupuvevarabesibulus.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/97476849230.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/81988974106.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_off00004653.bin
9b57554d101c3ec07779bfabbc71965a2b6ff0199677d6ff97c0a02d5b7fd812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4653 5264 bytes
font_01_sfnt_off00005855.bin
a1d0ee45f41f788fde76f050b88ae86304633a0ffcb1d0c831264366d70680f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5855 13632 bytes

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