Malicious PDF — malware analysis report

Static analysis result for SHA-256 820504571eb6d2a3…

MALICIOUS

PDF

48.6 KB Created: 2020-08-06 19:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f31af18d53888aa9d54c1080047cf159 SHA-1: c3054ac1120ba311464fa12f35d104b6a74a94cc SHA-256: 820504571eb6d2a3574e4102365cf3e0a3bd1fc7bc123a30dcf89ec3ac579e99
234 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically `https://ttraff.com/pify?keyword=pdf+annotator+online`, which is also flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to PDF files, suggesting a lure to download further content or potentially malware. The heuristic `SE_BROWSER_INSTALL_LURE` indicates the document attempts to trick the user into installing software, a common tactic for credential theft or malware delivery.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=pdf+annotator+online In PDF document text
    • http://files.agextonline.com/uploads/1/3/1/8/131856027/wawujetexaxibopux.pdfIn PDF document text
    • http://files.mamasteessentials.com/uploads/1/3/0/9/130969847/3767124.pdfIn PDF document text
    • http://files.leahkneipp.com/uploads/1/3/1/8/131871859/bawow_wizekun_forulaxiwob.pdfIn PDF document text
    • http://pefomam.miainterafricatv.com/uploads/1/3/2/6/132695384/lukosawef-domuguzu-gomusefojomojem.pdfIn PDF document text
    • http://files.allisondfredette.com/uploads/1/3/2/7/132740533/netilaxerares.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/1/0435/3612/2008/files/jinut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/87300619299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/71716973283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/watuvuvitubowijodix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/69295115370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/66996536260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9459/files/48111074350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/macbeth_revision_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/sleep_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5704/4890/files/foxaxopejuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/43737281956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2164/6498/files/lewibevukepawusosijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/accounting_principles_weygandt_11th_edition.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_off00008237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 4724 bytes
SHA-256: 60cf8b615c13fa76cbdb4b00982373b4b0ba81a68b75d4183c9265c10b0f1779
font_01_sfnt_off00009255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 10532 bytes
SHA-256: 90f2d7cb220ea1c195294fba461ed5556f85ff2aa1aeee9e928d76c9a831a541