PDF malware analysis — malicious · 78bc887ad9729d53

MALICIOUS

PDF

78.7 KB Created: 2020-10-28 09:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 116617b57d8bb934593955a7f3330a1e SHA-1: 3c3004813ab4c41cac3c2112289136d0bb8790fe SHA-256: 78bc887ad9729d537f44f926bcbf5e9f3add05c1597b60c1a8ff6b165303e216

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/123?keyword=aisling+duval+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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/123?keyword=aisling+duval+guide In PDF document text
- https://cdn-cms.f-static.net/uploads/4384143/normal_5f91720a92904.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380871/normal_5f8e75518b930.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370073/normal_5f8ba23e1cff6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391899/normal_5f90fc4df196e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387226/normal_5f9565057403f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370089/normal_5f95a859f08ff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371524/normal_5f8af33665888.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380413/normal_5f98e8e28043a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386618/normal_5f98be977b4b6.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/ibps_clerk_approximation_questions.pdfIn PDF document text
- https://s3.amazonaws.com/fulosobezur/annotate_application.pdfIn PDF document text
- https://s3.amazonaws.com/naxizugenabi/95489727003.pdfIn PDF document text
- https://s3.amazonaws.com/mamukawaxatali/25514935727.pdfIn PDF document text
- https://s3.amazonaws.com/patotale/53423448127.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/6593/1936/files/79525034076.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1306/3335/files/hgtv_canada_tv_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/7147/9201/files/free_fall_laboratory_gizmo_answers_activity_a.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/juvegipebugirafo.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/filewadanamamatil.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/balasevic_knjiga.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/7478/8769/files/17502265849.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7616/9109/files/23645864136.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0314/9479/files/convertidor_a_gratis_online.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0480/9316/7779/files/70568390239.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3DA	4948 bytes
SHA-256: `00cf2ccfba1485b4812097dc0d3da16f5d5debf83303817015fc28e7e792a61c`
`font_01_sfnt_off0000e4b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4B4	1800 bytes
SHA-256: `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`
`font_02_sfnt_off0000ed41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED41	11928 bytes
SHA-256: `ee0b1cdefdfcaf82341e122e521409d35717f1e48788b65d6dbbd85d8329b616`
`font_03_sfnt_off0001154b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1154B	16312 bytes
SHA-256: `975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15`

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