Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a10b9ee2773d4e5…

MALICIOUS

PDF

40.2 KB Created: 2020-08-27 18:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a84602041f7cd036be76078243e728a SHA-1: 57d072551f632b744ff1c5ffa6d9015f258da80c SHA-256: 0a10b9ee2773d4e53f726698b7afe77d1f00d3e31121679fd1b311a754cb6a13
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are likely part of a SEO spam campaign. The document body, though partially corrupted, contains the same malicious URL, suggesting an attempt to lure users into clicking it under the guise of downloading movie content. No scripts were extracted, but the presence of malicious links and the link farm heuristic strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.com/pify?keyword=blue+exorcist+movie+english+dub+download
    • http://durezom.ginkgopress.com/uploads/1/3/0/7/130776023/3361233.pdf
    • http://watok.artisanhandfood.com/uploads/1/3/2/7/132712336/jetuliwamebu_jevotojig_naxuposa.pdf
    • http://files.tierrasantajuniorwomens.org/uploads/1/3/2/8/132814906/656685b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/2932/3930/files/cad_blocks_cars_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/sawuroxojipuvekuxowedez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/20036029065.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/votovosefiragoluzuwun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/farapun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/vumir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/sadobowavodaperubib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/votatowolilupebopurezuje.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052bf.bin
ee63f9e48cd4b43d216198c3a86ee6dc98ed2336e09798f0de883d34973ebcfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 5760 bytes
font_01_sfnt_off00006641.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 1800 bytes
font_02_sfnt_off00006ecf.bin
0870fafabaf8da665f8122bf80bced82db292d78175a3ea2c6cade49c89cc6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 10816 bytes

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