Malicious PDF — malware analysis report

Static analysis result for SHA-256 b405b9e1636d1d53…

MALICIOUS

PDF

46.6 KB Created: 2020-08-19 10:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 809ce11dbb3b2e6235c08fe35088f0b4 SHA-1: 40a983241f5b7476e8789c235c7ebb8b41773163 SHA-256: b405b9e1636d1d53d364461fcfb368a3d11b01dab9df07d34ec83d3f1b1113d5
202 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on various domains. The presence of a 'download button' heuristic further suggests a lure to click on these links. The primary intent appears to be directing the user to malicious infrastructure through a deceptive link.

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.com/pify?keyword=bbmp+old+pid+number+format In PDF document text
    • http://files.stonemountain-capital.net/uploads/1/3/1/4/131452824/nezobunivoki.pdfIn PDF document text
    • http://files.buntcounselling.co.uk/uploads/1/3/1/1/131164198/nesen_taguladilojixed_degikaguvubede_pefajujus.pdfIn PDF document text
    • http://files.ccmplbca.com/uploads/1/3/1/6/131606373/susajodokipe-vulotibida.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/1/0437/4790/1592/files/ralovuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7479/files/storyboard_software_free_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8224/0420/files/active_and_passive_voice_simple_present_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/48376476426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/nom_riesgos_psicosociales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/66648508685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/4003678286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3798/files/whatsapp_profile_picture_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5105/6284/files/38335236813.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 5200 bytes
SHA-256: eed7bb240cce136a4f8e9817ecd8d5aed4d1a12152866824dbbfcb1dd823de96
font_01_sfnt_off00007551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 10112 bytes
SHA-256: 72080fb89f63b05d461afac04998045bb4535c8cfc207a4e827fca34654feb81
font_02_sfnt_off00009839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9839 16272 bytes
SHA-256: 36ed9caf719e0849df8fd87ade7d51f3d04b8af5454f1aaa896d38a56b473f78

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