Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad627291c9d18310…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 15:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63a141d123a508b67bb583d5d12229e7 SHA-1: 78492fb43d48a3d3d348741bccba8abb0b14c1ee SHA-256: ad627291c9d1831004f2f4eded28cd37795d51850ef2250d4816e9fc9114f966
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic firing indicates that a link redirects to known malicious infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=five+kingdom+classification+system+pdf, which is likely intended to lead the user to a malicious site. The presence of a link farm suggests an attempt to drive traffic to potentially harmful content.

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.cc/pify?keyword=five+kingdom+classification+system+pdf In PDF document text
    • http://wegugam.apdcwa.org/uploads/1/3/0/7/130776760/4103f5a536.pdfIn PDF document text
    • http://files.adenrossinni.com/uploads/1/3/2/7/132711966/4513352.pdfIn PDF document text
    • http://files.feel-flamenco.com/uploads/1/3/1/0/131069899/wemezorexib-xipaj-mosapodipafuvud-lugekajolivufi.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/1/0432/8413/6086/files/xewibaxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/ccna_routing_and_switching_200_125_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0332/7142/files/arindam_chaudhuri_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0460/4066/files/network_controller_drivers_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rijakilijupefiwopoxafeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/crown_copy_and_paste.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/the_art_of_business_process_modeling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/linux_edit_iso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/faderogarika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/gaxotuzur.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
🗂 Part of campaign: adenrossinni.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 5560 bytes
SHA-256: f4fc5e6dda1ef98001e633827dfc3d40b9a691075e00245115ccaa2e867332cd
font_01_sfnt_off00007264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7264 10000 bytes
SHA-256: 6535db4c1b144e694b2b67ec15dc22283e5e4f0047b24eebd934904cc820e29a