Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d2494d4f112224…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 13:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26869b68ea16ab5dc036cc6c3aa6df58 SHA-1: 4e5f603e6c4dfa6049df549c53954802aae3ba7d SHA-256: 91d2494d4f11222431144d1ed863fa67e6b091b3dc09a329a557d4042177470f
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to various PDF files, primarily hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=hernia+umbilical+fisiologica+pdf', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading users to malicious sites or distributing further malware. 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.com/pify?keyword=hernia+umbilical+fisiologica+pdf In PDF document text
    • http://files.alexsalvi.com/uploads/1/3/1/6/131636907/sogerotik-karum-panimo-pasexa.pdfIn PDF document text
    • http://files.allsaintsarts.com/uploads/1/3/1/3/131383648/8116279.pdfIn PDF document text
    • http://wubavase.icsc-companies.com/uploads/1/3/1/3/131379803/xibaxunezi_nitozowuvuseli_kunorovexi_lenawagew.pdfIn PDF document text
    • http://files.wiseowl3rd.com/uploads/1/3/1/0/131070196/b2361.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/1/0435/9559/5938/files/xonotowuzipefasejeralax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3195/1517/files/partnership_business_agreement_in_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/71266097927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/96086667445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3415/6967/files/sawifelazemaxekaxiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/zogudedow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/79287092974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/hunger_bar_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/principios_de_asepsia_y_antisepsia_en_enfermeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/siluzatefimibukibalok.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
🗂 Part of campaign: alexsalvi.com 3 samples

Related samples 6

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_off00006c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 5576 bytes
SHA-256: 554df426e836d9a4c0990a044b6c1d94fee9c8487a1ddb6aa608688333b4b518
font_01_sfnt_off00007efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 10052 bytes
SHA-256: 3db5fce7bec710689d559f272c8f2aacda340bf912cf8749b6ceaf28b7b40e3a

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