Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cf63e8b0f91847…

MALICIOUS

PDF

41.4 KB Created: 2020-07-30 17:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7c9b02f6712c33e95d72b6bd64f817 SHA-1: b85157271b5cf7b724479527481a7985dd47d949 SHA-256: 15cf63e8b0f9184780830cc461d2bcc1b3792aa03e5b61f5480a942483f3a1d5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.com, which is likely used to funnel victims to further malicious content. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is link-based redirection rather than content delivery.

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.com/pify?keyword=because+of+winn+dixie+test+pdf
    • http://files.bsmslibrary.com/uploads/1/3/2/6/132681556/tolofonuzirizel_suzuxafakesexir.pdf
    • http://files.sweetsituation.com/uploads/1/3/2/7/132740399/2826784.pdf
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/42706183414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/fukijorebavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/zoxobuluvemizuviz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/fetavewobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/bexul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8373/files/76412390816.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/dujorusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/62623255501.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/wetidakigojorekofuzow.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/95882642384.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/kifabuwipam.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/zamira.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006482.bin
d17ceadd182878c0b6fb54c792d6712b9c83b7e8f5a8efd8b23ee2bb39c82613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 5112 bytes
font_01_sfnt_off0000760b.bin
b9be292793abe1960aff9516802a44f22ccad66194d7ec072caadcb681b477cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 10160 bytes

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