Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8337f5624a1992f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 08:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51dbea1f211e3fcf3edb78ca903c4e9c SHA-1: 47694d1834ae05766e483cae11fffc4625d66d7c SHA-256: f8337f5624a1992fde8335faae8baf99844db57c2e70f814a5bca315ba3a7620
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it is a malicious redirector. It embeds a link that directs users to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The file appears to be a lure to a malicious site, likely for further exploitation or credential harvesting.

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=equilibrio+ionico+exercicios+resolvidos+pdf In PDF document text
    • http://files.aloannomore.com/uploads/1/3/0/7/130739480/3246839.pdfIn PDF document text
    • http://files.venueonthesquare.com/uploads/1/3/1/3/131398286/miwubaf.pdfIn PDF document text
    • http://files.mountainvalleygscamp.com/uploads/1/3/1/0/131070867/zekigew-buwedi-futode.pdfIn PDF document text
    • http://files.gregsmolka.com/uploads/1/3/0/8/130814065/pubunibizajedevi.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/1/0432/8305/4757/files/ley_anti_plastico_queretaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/12057588608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/31708587773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/3009750044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/98046179609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/halloween_coloring_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/history_alive_the_ancient_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/senanuxepikujul.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_off00005d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5288 bytes
SHA-256: 11e54d3f5c7375a5f6d6c957120f0240363a84cd11db48dee80e0cae4c66de2f
font_01_sfnt_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 10564 bytes
SHA-256: ad0b7703d225ef1e612a5ef191c5c7882911534c88939cf429986da383624a27
font_02_sfnt_off00009405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9405 16116 bytes
SHA-256: edc33fe94617b35fa5734827a91efdc9665031ac3a5a8b8018a6396f4204b3d2

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