Malicious PDF — malware analysis report

Static analysis result for SHA-256 372a949a98ad8277…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 21:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b27c17333a5a729d0cdaaa6d40007842 SHA-1: fbd19d2841fd2633eb20ad8e87a2b60e5106bc1f SHA-256: 372a949a98ad82771bd98df4fc41d19cd9fff11a7a86b082fcb27df041b130fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=anacardium+excelsum+pdf', which is likely used for redirection. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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=anacardium+excelsum+pdf In PDF document text
    • http://legowo.thelearningkirb.com/uploads/1/3/1/0/131069839/zuwad.pdfIn PDF document text
    • http://files.amandagretschot.com/uploads/1/3/0/7/130740465/255637.pdfIn PDF document text
    • http://kobidad.svejnar.com/uploads/1/3/2/8/132814930/ximubekifuma-wurolopalepos-poguva-bobojuj.pdfIn PDF document text
    • http://xosifatuk.mrsamartinez.com/uploads/1/3/0/8/130814328/lipuwezonoxuta.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/1/0435/0777/7700/files/jenumefepebezej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/epub_to_calibre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/49925877139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/athletics_jumping_events.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/tamodewevaroxafofukidatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/84158177525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4352/8599/files/lakesesetudiwakul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/3923083503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/dojokeseretakadisisuregej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/vuleju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/hernia_de_disco_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/belajar_gitar_otodidak.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 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_off000068dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5360 bytes
SHA-256: f8e4e880ba21aeca3575bbab200d867854d08609a53137a8bac3e211381f4cb4
font_01_sfnt_off00007af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 9908 bytes
SHA-256: 99446743e0217f6a8482b0517fe70026a9b2e246b1766da409ade9be588199ad

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