Malicious PDF — malware analysis report

Static analysis result for SHA-256 04458134a84260ec…

MALICIOUS

PDF

48.7 KB Created: 2020-08-19 01:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c644ab4c1ea764c5a2ea0c4d57f79ed1 SHA-1: b99db7a2206dc128ee44c07c5622d666628328bd SHA-256: 04458134a84260ecb9c4a1a53f5b5869e1f45655dbe17428e4648b63a28e3feb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into visiting a potentially harmful site. The ML classifier strongly indicates maliciousness, and the presence of a link farm points to SEO poisoning tactics.

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=guideline+pulmonary+embolism In PDF document text
    • http://files.2andahalfcups.com/uploads/1/3/1/4/131453733/dijun_fidafevino.pdfIn PDF document text
    • http://files.casa-de-colores.com/uploads/1/3/1/4/131437283/9955421.pdfIn PDF document text
    • http://files.artizaninternational.org/uploads/1/3/1/8/131856446/gowusomas_zawigegolanep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/xunomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/numitenolig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/biases_in_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/fisiologia_de_la_vejiga_urinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/78069324891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/koluwasuzelidelel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/briggs_and_stratton_vanguard_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/57477426525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/ethnographic_method.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 5180 bytes
SHA-256: c9ffbbdb321f673f943839da99c91e62f0e62646f748985d704a4cec1f870478
font_01_sfnt_off000075b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 6172 bytes
SHA-256: ee3285731637e3ec4cf4d3377ae7406a9ecbb593e905398ce72c0c4d9f8c2bc6
font_02_sfnt_off000085bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BB 9888 bytes
SHA-256: 0ba7aef33120f8c8058f3e8467a5190065b10faac655b28180792f27ce67e96a
font_03_sfnt_off0000a79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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