Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb62b63105bd1967…

MALICIOUS

PDF

62.6 KB Created: 2020-07-30 17:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c89c04d6617092afd6222b4f701fd9 SHA-1: 3c8cae92e0f65cb3d59f211cbfe22301f643895c SHA-256: cb62b63105bd19677691a770dc2044600a8404c74c3bfc0cba7d268ee30c7b3e
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying a 'PDF links to known malicious redirector infrastructure'. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or phish users through a large volume of outbound links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=fasciola+hepatica+pdf
    • http://files.wellesleyhistory.org/uploads/1/3/2/6/132680986/4652867.pdf
    • http://files.tributegiftsgp.com/uploads/1/3/1/4/131437149/kovalaxewubipizenete.pdf
    • http://files.moombaparkps.vic.edu.au/uploads/1/3/0/7/130775373/c5743df461ee.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/33430327574.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/rojamuforusasopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/famela.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/bowafofogazexuwamorodojar.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/zolasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/34590497718.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/zizonasesuregopodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/zejufeso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/koraxomebediz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/40361897731.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_off0000ba29.bin
786eec14755c60306f34e699ed06a063b66ef0d6baf440ca2e7307b4ee0bf3d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA29 4784 bytes
font_01_sfnt_off0000ca75.bin
715719a7b980a6b50cd5c4090e634ce41faa3dbe5353be97fbd7a5161c9fcb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 10260 bytes

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