Malicious PDF — malware analysis report

Static analysis result for SHA-256 857404d1de344712…

MALICIOUS

PDF

47.9 KB Created: 2020-08-07 03:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b00d9431f9856be174b1683b95fd9fd SHA-1: 12ce4be6168f8b0726acb47e40aa2ef86b363034 SHA-256: 857404d1de34471243e395da2f8d745e5a23f2f7e04fd992c1209dcefc646fc7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external resources, many of which point to a redirector infrastructure known for malicious activity. The document's content, though obfuscated, appears to be a lure, presenting itself as a 'Corel draw x5 shortcut keys list pdf' to entice users to click on the embedded malicious links. The ML classifier strongly supports the malicious verdict, and the presence of a link farm further indicates a campaign to drive traffic to potentially harmful sites.

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=corel+draw+x5+shortcut+keys+list+pdf In PDF document text
    • http://files.solcreative.co.nz/uploads/1/3/2/6/132681976/kutodonojog.pdfIn PDF document text
    • http://gexapeniw.sweettoothtime.net/uploads/1/3/1/4/131407424/wubixogeradomum.pdfIn PDF document text
    • http://files.1slanddesign.com/uploads/1/3/1/0/131070459/1163040.pdfIn PDF document text
    • http://files.lavernerosephotograpghy.com/uploads/1/3/0/7/130775980/pejujuriname-tepawosolabu-fidinadamig-mamitepana.pdfIn PDF document text
    • http://files.naranjitaflamenco.com/uploads/1/3/0/7/130739704/6f987d97.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/1/0430/9018/2304/files/tofobugebewademiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/kijifunuralafubovimubafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/konudivabepag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/56141696290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/17075378572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/enterprise_architecture_styles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/napoziwuwululupivasozuser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/how_to_allocate_more_memory_to_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/british_parliamentary_debate_speaker_roles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/gta_5_mod_menu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/19978353028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/nopab.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.

FilenameKindSourceSize
font_00_sfnt_off00007705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 5596 bytes
SHA-256: ef52a91d6f416d16f40d8afc9a61cb769b9c9ef0b241853622a93f0d824704e8
font_01_sfnt_off00008a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 12716 bytes
SHA-256: 7f03843c0bf8fcc53362dd82d7a7fc398ada3b2dc919625ad783224967604af6