Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40109670b75d765…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 18:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15ae2fc9dc54632cc89da4b6761602bf SHA-1: f92de39ce101ab6705c5db9269303f2f57549e07 SHA-256: a40109670b75d76564bb953f89a967c3bd5bfc6847d7d114b47bfb7d6835fef2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though obfuscated, contains text that appears to be a lure, and the ML classifier strongly indicates maliciousness. The primary attack vector is likely spearphishing, leading the user to a malicious redirector.

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=im+looking+forward+to+see+you+answer In PDF document text
    • http://files.rocnap.com/uploads/1/3/0/7/130776120/sezaxap_nebeb.pdfIn PDF document text
    • http://puvuwupa.unityroyaloak.org/uploads/1/3/1/3/131379732/dd07873d2ef.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/1/0431/8547/1656/files/73657786827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/warhammer_40k_necron_codex_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/somuluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/93818982471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/33775241039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/xofaxigemigukaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/96196390733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/how_to_install_sql_server_management_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/babibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/33043510039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/text_document_to_converter_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/43480643593.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 5420 bytes
SHA-256: 1bdca91d8d81305d4723fa489f2325fe5bdce2e6372a28a853584e05a00a0ff6
font_01_sfnt_off00007f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F24 10120 bytes
SHA-256: d5686acef1a40279c5c9a129b93c9d7d577c019cc83e3178cab27ec6aad7a9df

Open this report in the interactive analyzer, or submit your own file for analysis.