Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d98327fca8034e0…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 14:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a6b6bda1f008addc9fb8e80c6322c14 SHA-1: 00342a164496c921a76232929a39d4dd60f6cbb0 SHA-256: 4d98327fca8034e06618e991c99a9de76f0d2603c71b8c16218d15625c1aa334
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-themed and point to potentially benign content, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination.

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=behavioral+therapy+for+adhd+pdf In PDF document text
    • http://files.rvtakids.com/uploads/1/3/1/4/131407138/mutiluseloj.pdfIn PDF document text
    • http://kijovis.mvsutah.com/uploads/1/3/2/6/132695829/5999820.pdfIn PDF document text
    • http://files.the21stcenturybody.com/uploads/1/3/0/8/130813108/2542227.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/1/0430/6783/4517/files/az_900t01_a_microsoft_azure_fundamentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/cost_accounting_standards_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/vmware_workstation_12_for_ubuntu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/read_incest_comics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/40919666492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/99514797765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/83542305130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/26759443643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/98843729150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/mokogovugujepejoxazif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/tegosuvabovopix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/rawusuwub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/66217419942.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 2

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_off000067d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D4 5160 bytes
SHA-256: c0fddb606d10f664b6ac6c20e2194e5ed94a315cea85c33e286398876d23bdff
font_01_sfnt_off0000796e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 10180 bytes
SHA-256: b301aa21df7b2c8071d4b9122d0288c848fa9d522e2ec1c88bb99459512adfdb

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