PDF malware analysis — malicious · 9a13edea77d90004

MALICIOUS

PDF

45.8 KB Created: 2020-10-21 02:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 6404dcceeefaa5ecf1547ab22356f417 SHA-1: e21a1cb1b710b3cdd87c2fe628773028b2a0cd0a SHA-256: 9a13edea77d900044064c2709ed91181014ec75e3d8fe261feb7eb91f122c146

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://ggtraff.ru/123?keyword=prefix+suffix+worksheet+pdf In PDF document text
- https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5781805.pdfIn PDF document text
- https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/saganoka.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/fbb27569-2a87-400f-8f93-1397433341a3/wivadotolirisuwamuwopa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dadcb34c-e8b8-4667-aac5-a6545933c9ea/47178891226.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c8539d2-12ca-4087-a9bd-42c729784e8c/7454163033.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aba60f29-70da-420a-970f-a7226ba35e21/peplum_top_pattern.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a81ebcdf-2f01-4469-a801-1e546b91ab76/duzisewibetom.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/poloxifixazujami.pdfIn PDF document text
- https://s3.amazonaws.com/wilugugo/benzene_sds.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/city_of_endless_night.pdfIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/fekajefaverugazetasa.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/5407669148.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/pharmaceutical_aerosols_lecture_notes.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/bixes.pdfIn PDF document text
- https://s3.amazonaws.com/memul/sbac_practice_test_7th_grade_math.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7125/8278/files/luguful.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/8723/1674/files/kofiwijexino.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/1465/1559/files/correct_verb_tense_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/7108/7007/files/dabinunizaliravera.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/3034/5403/files/download_google_play_services_apk_new_version.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/6238/9667/files/65751440661.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/3409/0913/files/baidu_root_latest_apk_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/1058/8312/files/choices_apk_android_1.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/3862/8762/files/14668211541.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_off00007580.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7580	5112 bytes
SHA-256: `f0ad0bbb8284daaf65538562fef9526c054cab71a828043678221d2ff8551fa5`
`font_01_sfnt_off000086f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86F6	10088 bytes
SHA-256: `cd274c586758a13a4669c09abc8471dc724db5a4177cb06c5b984201c3dd656d`

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