Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db791b048fcf8e8…

MALICIOUS

PDF

49.7 KB Created: 2020-08-20 08:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 22c43b87148ce15b6a502d2c36686907 SHA-1: 4856e6605e0cc14557d4f2bb8641e3b691aaf653 SHA-256: 3db791b048fcf8e85c24a66988a51014dc714431692f1ac48f569fb6e69fbfb3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly legitimate documents. The primary malicious link identified is https://ttraff.ru/pify?keyword=chatuchak+market+guide.

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://ttraff.ru/pify?keyword=chatuchak+market+guide In PDF document text
    • http://ruranap.necoraindustries.com/uploads/1/3/2/3/132303354/7214223.pdfIn PDF document text
    • http://files.255milledge.com/uploads/1/3/1/6/131637606/kowusex.pdfIn PDF document text
    • http://files.savannahgreendirtdesign.com/uploads/1/3/1/0/131070109/9903756.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/1/0447/0043/4586/files/sahih_bukhari_hadees_in_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/78356878291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/adobe_reader_chrome_plugin_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/lavekisalorukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/zubezulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/audio_visual_aids_in_nursing_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5027/7783/files/tenuwurigadogiwote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 3992 bytes
SHA-256: fded95aaaa2b20793f9af7ce6cfa0453c012dc0dd1da0d1d27aa689b59cc1e00
font_01_sfnt_off0000738f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738F 5112 bytes
SHA-256: 9471de83549496272858bf8b0456fd53445b5c5ef8e41472f2d9e3920e90f841
font_02_sfnt_off000084c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C1 3048 bytes
SHA-256: d52427c20a34349d3b654ac30222deac5268d4533592bdfc5a2ac1007eedcc35
font_03_sfnt_off0000913f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913F 12420 bytes
SHA-256: 20b96292bd49a0462cc7fd4ed862732839ba85017a5496004cfb6e507e81ff1a

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