Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be678917c52a84d…

MALICIOUS

PDF

47.4 KB Created: 2020-07-30 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde4e55b1003395f12a86c858a8dec0f SHA-1: f44f9c7d35d9a095c785bd20c6446b0e460265f2 SHA-256: 7be678917c52a84d24317d0217f598fb0300996cf95c0413a476558feb3cfc5e
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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=arecanut+diseases+pdf
    • http://files.anzqan.org/uploads/1/3/1/3/131383743/e9e459.pdf
    • http://files.pandakungfucenter.com/uploads/1/3/1/3/131383657/d8b97e7d01b5.pdf
    • http://files.chillstonehouse.co.uk/uploads/1/3/1/3/131379877/tatururex.pdf
    • http://files.iditarod100.org/uploads/1/3/0/7/130739120/5622614.pdf
    • http://files.milwoodunitedmethodistchurch.org/uploads/1/3/0/8/130873732/86f5de76cfe1f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/zewexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/femasoperuvuvunulile.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/gadoxuzowovukaraw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/fogagore.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/mimizelogolive.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/81724781930.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/93014878275.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/29150741429.pdf
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/zisakoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/nunifirivezururufig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/xasibowakimemesumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/dexosobosovi.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/
    • https://cdn.shopify.com/s/files/1/0434/1858/3192

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e17.bin
a14a825ebbd9a986a22cb6d768c6b9408b5ac865c49ea81fb8bb26d946c671ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 4876 bytes
font_01_sfnt_off00008eb2.bin
3a121257465f91fd8056e95585dfb80a924178b86d2ebfd9d95a9d3d6cacc169
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB2 10016 bytes