Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25cc4ed96b9ff9b…

MALICIOUS

PDF

48.2 KB Created: 2020-08-10 20:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a0424c6bc7131dc2e72f9dd1039df6 SHA-1: bcef0b8f151411daf942e128a5a26a22b69dbf8b SHA-256: b25cc4ed96b9ff9b645a55f98c71f4774773739f13322d44f3109e1238019585
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including a critical redirector link to 'ttraff.cc'. This indicates a likely attempt to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious redirection attack pattern.

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.cc/pify?keyword=bosque+tropical+lluvioso+pdf
    • http://talod.awakenhopeandwellness.ca/uploads/1/3/0/7/130738836/tulutedinomolizol.pdf
    • http://fukanuj.hopegoodells-lcms.org/uploads/1/3/1/4/131405927/4782986.pdf
    • http://files.shellysrockshop.com/uploads/1/3/1/6/131606128/baxefiram.pdf
    • http://xupilupi.forestbooks.net/uploads/1/3/1/3/131383483/pimilolakotuxewelol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sogikorovobiromiral.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/14992540794.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/66079683996.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/jogavabasagimufoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/ximivonapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/salexewexubesabonosir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/24984416312.pdf
    • https://cdn.shopify.com/s/files/1/0452/1807/0685/files/me6602_automobile_engineering_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/24490338743.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/55685812175.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/53164642483.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/22284032087.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/mafiduredejesidanog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/tetoxefegidikikaliter.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_off00007cf2.bin
93825a4c1128864d278a7de217c0e7a7ba82ebb736df762bfb1828180dcaddfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF2 5384 bytes
font_01_sfnt_off00008f55.bin
09a597649f7b1396b87f6c2efb5623ec96de53242d7b81fc168dde1010faa269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F55 10616 bytes

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