Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788d51352831e7d…

MALICIOUS

PDF

51.5 KB Created: 2020-07-28 17:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf97c84864c1ac7a66fa45eae65f0dee SHA-1: d4a246be8c1dc849d8dbde4fe98fe793ba583a89 SHA-256: 4788d51352831e7dbed78fdf03a5caacc9cd8379c51da7cba7250bdc602b940c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The presence of a 'download button' lure further supports this. While no scripts were extracted, the PDF structure and embedded links point towards an attempt to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=company+law+practice+manual In PDF document text
    • http://files.kpcohuntsville.org/uploads/1/3/1/0/131070207/vexavaminonikej-zedumi-tetogipiw.pdfIn PDF document text
    • http://files.happy-cow-bakery.com/uploads/1/3/1/4/131438419/5028588.pdfIn PDF document text
    • http://files.huntersvillelawyer.com/uploads/1/3/1/3/131379183/tosuz.pdfIn PDF document text
    • http://files.heidibarongodoff.com/uploads/1/3/0/9/130969659/setolusod.pdfIn PDF document text
    • http://files.malvoncollies.com/uploads/1/3/1/4/131408581/xibapijudunewij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/48209741270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/77868035839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/mezakosanojiterumomig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/27213373637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/moviwakituda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/ruronel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/puwifonadafawam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/61394353572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/guvedireto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/20392927090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/poxetapidosipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/dejax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/94756627696.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4B 5000 bytes
SHA-256: 669d7fef14f2a2e6c88aaee7246439d6a59a80c619f3f492993135df0a514f70
font_01_sfnt_off00008d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3E 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_02_sfnt_off00009d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1E 10404 bytes
SHA-256: 604f2a231ccffcddae37c9a2688791e98f556c79f99547b85b2b8a3f5c8c5bd4