PDF malware analysis — malicious · 8b8914b55a035fce

MALICIOUS

PDF

52.3 KB Created: 2020-10-19 07:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: cf8f6403a4ba6b976a94534d03c986ab SHA-1: c47ed8d8684b22946527629effbf5e82888782f4 SHA-256: 8b8914b55a035fcea46feaf2b539375325fc8e925a27fe68f99cce4e56d7dbeb

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://cctraff.ru/strik?keyword=the+sims+3+mods+folder In PDF document text
- https://cdn-cms.f-static.net/uploads/4378830/normal_5f8c85b58923c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368949/normal_5f88dc0dccff9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375356/normal_5f8a97f73499d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377656/normal_5f89fd6e626a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366028/normal_5f8d0ae9ec0ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366655/normal_5f8a05636d7f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369664/normal_5f8a89db1aee6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371247/normal_5f888cf949669.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365613/normal_5f870b11ba688.pdfIn PDF document text
- https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/4deb66db41.pdfIn PDF document text
- https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/suxazuvijinawe.pdfIn PDF document text
- https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/1009015.pdfIn PDF document text
- https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/7390765.pdfIn PDF document text
- https://gadigode.weebly.com/uploads/1/3/2/6/132680949/serenizevivowubon.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0484/1875/0616/files/toros_del_este_jersey.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/8926/7362/files/cell_cycle_matching_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/9929/4363/files/zejajeg.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3876/0342/files/sanakorolok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/9677/9168/files/53824766811.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0492/7589/5989/files/christian_songs_guitar_chords_and_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/4012/6614/files/21054494609.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/8985/7174/files/motion_to_expedite_trial.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/3757/5326/files/58758488371.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8014/6343/files/15534675770.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000824f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x824F	4652 bytes
SHA-256: `4004f21d62083653cd7e3943a9cc2018c5f34ffda59bef8a1033fe08c479f1bd`
`font_01_sfnt_off0000920c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x920C	10336 bytes
SHA-256: `58271eca601c2b4bcbe8fb636e78a0fa3e8996fc7f96de241711d8e35b6cd482`
`font_02_sfnt_off0000b573.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB573	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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