Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40f4e461722aca7…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 17:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03557c4c80db53ff88e392ff270b762f SHA-1: fcff01a5630f8fa76acd2badcb89afb153b1d6fe SHA-256: e40f4e461722aca7dc01a6f687829a64dcce9e6b4c9fbc797ec3a3bc5d056115
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of the URL 'https://ttraff.ru/pify?keyword=fisica+atomica+e+molecular+pdf' suggests a lure related to academic content, likely to trick users into clicking through to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=fisica+atomica+e+molecular+pdf In PDF document text
    • http://files.chispasuf.com/uploads/1/3/0/9/130969241/4660900.pdfIn PDF document text
    • http://files.editorialmapale.com/uploads/1/3/2/6/132682630/xiromudamek-dujuloreresis-vagowukozil.pdfIn PDF document text
    • http://files.gunhillstudios.com/uploads/1/3/1/6/131606739/c3c8bf25ba604a5.pdfIn PDF document text
    • http://files.michaudwellness.com/uploads/1/3/0/7/130739076/xumuxifiwewikejo.pdfIn PDF document text
    • http://files.thessalonikicitytours.com/uploads/1/3/1/3/131384286/d8de67b.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/1/0431/3976/0285/files/toyota_owners_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/maxefiwexado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8828/8675/files/bowog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/61132744812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/rizapovuvazobanabiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/bsa_emergency_preparedness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/sovenik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/75002875449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/winobisolujugat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5455/0440/files/4_class_english_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/wojurexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/albuminuria_valores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/tuvezo.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 4

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_off00007024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7024 5256 bytes
SHA-256: 6d6a0958045253fb8922679d40c7ff16fed21404e1e8734e42cf19d4e5c04368
font_01_sfnt_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 11152 bytes
SHA-256: ce84f54f2cee52f82ba3758381e8b35ef55499322236d350737ed8bc23bfcb8a

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