PDF malware analysis — malicious · 8b91ad645a9eafcd

MALICIOUS

PDF

61.1 KB Created: 2020-09-19 12:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1a3ab936bd9afdbedb3ca50cc71d7e5c SHA-1: e4040284f06d004529733b055055daabd2d73cc5 SHA-256: 8b91ad645a9eafcd811621bb4f3816d746d91f045adcf47fb37db6eba72d43fe

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a deceptive title 'Incremental change is a moral failure' and embeds a large number of links, including a critical redirector link to 'https://ttraff.link/wix?keyword=incremental+change+is+a+moral+failure'. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lead users to malicious content through a link farm.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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.link/wix?keyword=incremental+change+is+a+moral+failure
- http://zuxiteni.gameplanu.org/uploads/1/3/1/3/131383599/tirewifevifuk_ketax_taxil_kujukisu.pdf
- http://files.hkgoldendragonawards.org/uploads/1/3/2/8/132815791/01f31.pdf
- https://b7d262d9-0b00-4de7-960d-e06fd1781a3b.filesusr.com/ugd/96768c_54994951020b4eb78fcbeaa5a2bca103.pdf?index=true
- https://6f30df14-3181-4bf3-bf30-29114d5de280.filesusr.com/ugd/3f8d85_86091bf0b02d426da7d2e4635d18a27d.pdf?index=true
- https://d087f840-2da9-4136-82e2-09684321878f.filesusr.com/ugd/1b6cec_91a9059d9544445da66a9c2ff5b18a05.pdf?index=true
- https://ac3860f8-e370-4f08-8830-2d35bfe19365.filesusr.com/ugd/badafb_e759c0b48e0f47fd845400af70b7a1f2.pdf?index=true
- https://cdn.shopify.com/s/files/1/0430/4545/3985/files/platform_perches_for_birds.pdf
- https://cdn.shopify.com/s/files/1/0462/5930/6645/files/fox_sports_2_america_tv_guide.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009ba1.bin` `0dfde89b70b726e3d28b02c8cdd711855a5756f79ec12b9f7edb6d6ed5752761`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BA1	5232 bytes
`font_01_sfnt_off0000ad3f.bin` `028bce9da516102f9f145a5139a12738deeb9220a9a9de814e3e4539107b6055`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD3F	10740 bytes
`font_02_sfnt_off0000d20a.bin` `0c8c72c54c45aec51cbecc749d7b5ca8eb9171e06c2ff5b0d450de24c2068383`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD20A	16204 bytes

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