Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe88412b235d70b5…

MALICIOUS

PDF

47.7 KB Created: 2020-08-12 22:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce83775f7c421a046d918134a0e5de6e SHA-1: b690afb9cb3bc278b3367cbcfdcb48a08a9abc5a SHA-256: fe88412b235d70b557f4381587f4495e14947876098444514a20a601bb485391
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=fetal+heart+rate+monitoring+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or malware distribution, under the guise of providing a PDF document.

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=fetal+heart+rate+monitoring+pdf In PDF document text
    • http://files.yahshigul.com/uploads/1/3/0/7/130740110/8beab65e2ba5b3.pdfIn PDF document text
    • http://taximes.historicalhauntsmemphis.com/uploads/1/3/1/3/131380183/kunijogax-levox-pewojotivosu.pdfIn PDF document text
    • http://files.dscampers.co.uk/uploads/1/3/1/4/131438111/9647471.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/1/0433/0687/7080/files/vinupagudesezubinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/78167133851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8172/7129/files/mojavasowojitezizeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/luxutuwasovupugetufipere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/wefopuvazip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/subtraction_with_regrouping_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/bncc_educao_infantil_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/35961994713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/11392988276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/megodajopami.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_off00007d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 5232 bytes
SHA-256: c9e49a205fd20b875ba3268185e2458f7d0066a8a5db2a01ff711858bcce3f9c
font_01_sfnt_off00008f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F13 10140 bytes
SHA-256: 0f78f1faa745164733706a25b72466012897cfa8cf71677eb79aee916732081f

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