PDF malware analysis — malicious · aa4ed3f890d0cd3f

MALICIOUS

PDF

38.5 KB Created: 2020-10-31 23:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23

MD5: e68a13674823160ec3b870cdec749097 SHA-1: dd539b3e3a075296c8d5c8fee65308916adb442e SHA-256: aa4ed3f890d0cd3fd221e17161a0f7082048ed8c6bd3312066102a6328a1ab3d

134 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
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://ttraff.me/123?keyword=differential+equations+zill+10th+edition+pdf In PDF document text
- https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/xotup-xadejawonu-zamalofe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393506/normal_5f9581e7bf9e2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426813/normal_5f990e0f95fcb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380522/normal_5f8d80c1e66e8.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/1/0266/9602/4261/files/tanggung_jawab_auditor.pdfIn PDF document text
- https://s3.amazonaws.com/jazuravazaguz/72647760946.pdfIn PDF document text
- https://s3.amazonaws.com/kezemiradigu/dancing_santa_gif_animation.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/4018763436.pdfIn PDF document text
- https://s3.amazonaws.com/dejolavubukugeb/seattle_city_zip_code_map.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_off000057f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57F9	5500 bytes
SHA-256: `a15e8b8e91ee317d6c3c43f0ed796b0e1eae9e98757642a13f4344039fbf79ab`
`font_01_sfnt_off00006ab5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AB5	10232 bytes
SHA-256: `7f2fb5664c793d20789bbf1f3b9ee7e7ee422c0dce93639630ce8c317e3b460a`

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