Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9dd87c680587ea…

MALICIOUS

PDF

86.4 KB Created: 2020-08-06 11:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d8d221c2acf8675d1fe3a19885c7fde SHA-1: c602ad9c7d128c383fb54756c56abd0a720df7f8 SHA-256: 0c9dd87c680587eafe3bc5d47b706d63b291a8d988341d9dcd78e6ef58a7b268
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=boundary+layer+thickness+pdf In PDF document text
    • http://sener.gregadamsart.com/uploads/1/3/2/7/132712358/5163429.pdfIn PDF document text
    • http://files.samuelartist.com/uploads/1/3/1/0/131070331/sigevilis.pdfIn PDF document text
    • http://files.neverthirstagain.co.uk/uploads/1/3/1/4/131482976/dodazipodi-jaxopabenu.pdfIn PDF document text
    • http://files.dancebykris.com/uploads/1/3/2/6/132682758/da9b0c631aa8c.pdfIn PDF document text
    • http://files.huwhatwear.com/uploads/1/3/0/7/130776490/natevowuzuripix-bufibovevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/19450214238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/hard_disk_sentinel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/powovemexuwuwukolutuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/valid_addresses_in_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/95423028457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/gajinokemesuwivitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/wojupemakora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/45627655382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/31331781605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/72731607004.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 5340 bytes
SHA-256: 084861947ee0f9f14fb1da527bf9f27f53b314cf2b348f89b8a0866aa4506fbe
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 17748 bytes
SHA-256: 838a92aad90f143a020bd0ffe22b8d40e5d1d4b116d05003c5d72feb50047623
font_02_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 16112 bytes
SHA-256: da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10
font_03_sfnt_off00013d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D71 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c