PDF malware analysis — malicious · c117445bc38960d2

MALICIOUS

PDF

40.3 KB Created: 2020-10-08 16:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 41cbcad225004d4dafeb3e9eec80a326 SHA-1: efe7f726af0c138379497a2748bd3d5ff73e7dec SHA-256: c117445bc38960d2739042afb9836de69f6b2ec01b31d7b03dcf6c7abd590f7d

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic firing for a malicious redirector link. The embedded URL, https://ggtraff.ru/strik?keyword=les+microzymas+une+revolution+en+biologie+pdf, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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://ggtraff.ru/strik?keyword=les+microzymas+une+revolution+en+biologie+pdf In PDF document text
- https://site-1036824.mozfiles.com/files/1036824/dagunagamu.pdfIn PDF document text
- https://site-1041081.mozfiles.com/files/1041081/91155879256.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/1/0463/0380/5600/files/la_vuelta_al_mundo_en_80_risas.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1071/1971/files/second_great_awakening_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/8963/4491/files/extensor_carpi_radialis_brevis_stretch.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/0128/2211/files/dmv_kent_wa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0477/5123/3692/files/bonitolixigisarez.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/9579/6133/files/tubemate_apk_2019_may.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0465/1873/0902/files/76628294988.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000059d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59D5	5768 bytes
SHA-256: `eda1894c284d8734954e7ce1477ba00a61a5bd29efa95a1e44cc440f15718bfe`
`font_01_sfnt_off00006d7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D7D	11700 bytes
SHA-256: `276a6c5d9eb030f2a7822895437ebac48e0f406ea33fe04b5d573acc01ce08b2`

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