Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed237fe2254012b…

MALICIOUS

PDF

64.5 KB Created: 2020-08-05 03:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671b095496bf0bfac5da9952acb9e938 SHA-1: 58a40a57e3585352e5779fe362c93f8566d207e0 SHA-256: 6ed237fe2254012b0e26daf03f2ad8a9cdad556e566e20c46f451e14ca9d4ce1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, https://ttraff.com/pify?keyword=english+words+meaning+in+tamil+pdf, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of numerous links indicate an attempt to drive traffic to malicious infrastructure, likely as a lure for phishing or malware distribution.

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=english+words+meaning+in+tamil+pdf
    • http://files.notchknocker.com/uploads/1/3/1/8/131871424/9499386.pdf
    • http://files.keepingthefaithal.org/uploads/1/3/0/9/130969204/gusosigogusiluf-nokaxofinajos.pdf
    • http://files.horeca-care.com/uploads/1/3/1/3/131398194/pigakitusaritukukige.pdf
    • http://wewifes.peterarmstrong225.net/uploads/1/3/0/7/130776046/e716e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/1242/1789/files/2216767712.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/41321552608.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/67215370590.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/74833226058.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/fall_2016_tv_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/89467638307.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/vabuwukilufuregufefuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/5329613087.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/robipevaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/xuporesal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/bufaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/29533739626.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_off0000907e.bin
4b9bc848e5eddecd78dcb69b9eb0797f3cace790db36f6b1e8e9d24ddd427cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907E 5504 bytes
font_01_sfnt_off0000a31f.bin
33672c924352f4c0b082d7370cfa3507755e00c3776452f465cf9bd9df0ab0c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA31F 17572 bytes
font_02_sfnt_off0000ca13.bin
155fddbcd5a8d965779bd8ad2d65b150e2ddb44852d01863096363743651e195		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 13504 bytes

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