PDF malware analysis — malicious · af32f563e4f66964

MALICIOUS

PDF

47.9 KB Created: 2020-10-02 16:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 7764383b381691511aca97cb88595338 SHA-1: baa3292d070424461d712d99e201f7289a509580 SHA-256: af32f563e4f6696429e905bb89520697944ecb769ab2ad37b2a782ab3f7b7a23

184 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://gettraff.ru/strik?keyword=momentum+and+impulse+problems+with+answers In PDF document text
- http://bamad.ortegaalberto.com/uploads/1/3/0/7/130775189/3328051.pdfIn PDF document text
- http://files.wholeheartedsolutions.com/uploads/1/3/1/0/131071175/sugeloxexibax.pdfIn PDF document text
- http://punoxowe.parkpostoffice.com/uploads/1/3/1/4/131438500/jumuv.pdfIn PDF document text
- http://files.teacherontheroad.com/uploads/1/3/0/7/130740189/7253012.pdfIn PDF document text
- https://site-1040990.mozfiles.com/files/1040990/kikozijejujuvolaliripal.pdfIn PDF document text
- https://site-1039933.mozfiles.com/files/1039933/30448109340.pdfIn PDF document text
- https://site-1037848.mozfiles.com/files/1037848/mojopiro.pdfIn PDF document text
- https://site-1036873.mozfiles.com/files/1036873/detal.pdfIn PDF document text
- https://site-1039349.mozfiles.com/files/1039349/nizevurepilunuzagukot.pdfIn PDF document text
- http://juxafi.middleburyactors.com/uploads/1/3/2/7/132710621/8759360.pdfIn PDF document text
- http://wibij.northlinefarms.com/uploads/1/3/1/6/131636755/4ddeb401f08cc.pdfIn PDF document text
- http://files.franceswatkinsartist.com/uploads/1/3/1/6/131606072/5f06ffc4a9864ed.pdfIn PDF document text
- http://tofavu.baycolonygardenclub.com/uploads/1/3/0/7/130739298/714339.pdfIn PDF document text
- http://files.friendsofottawanwr.org/uploads/1/3/0/7/130739987/wofoviwizoraxumitofu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0457/6237/9940/files/mevafibek.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0480/8920/2851/files/11043446605.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3333/7768/files/aag_2020_program.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000067c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C0	5436 bytes
SHA-256: `9af1f7355c4d959f4bbd6ab58b381b6d5d81e22c5d16d7cfae6e7be4fc174948`
`font_01_sfnt_off00007a20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A20	10192 bytes
SHA-256: `1e5937c6de2ae7950cc1f90803c99b89ca4d2dbebf041d135b352d2e22778aec`
`font_02_sfnt_off00009d27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D27	16060 bytes
SHA-256: `713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74`

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