Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3f78adafac2bd5…

MALICIOUS

PDF

38.6 KB Created: 2020-08-16 18:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dc1aae96377c0c96fa1a69448c98a9b SHA-1: 3af3927a848b9d58cc7f7d7f6b49a1abd1bbaf44 SHA-256: bd3f78adafac2bd5e2739ae054ca75fde73ba8953e6a4c6a91202ec921d9d5e1
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm designed for SEO manipulation, further suggesting malicious intent. The primary goal seems to be redirecting users to malicious infrastructure under the guise of providing a humidifier manual.

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=aprilaire+humidifier+560+owner%2527+s+manual In PDF document text
    • http://files.traditionallaycarmelites.com/uploads/1/3/2/6/132696174/3538679.pdfIn PDF document text
    • http://files.metrovanmoversphotoblog.com/uploads/1/3/1/6/131606953/raxujusolipewaz_jetodonivobu.pdfIn PDF document text
    • http://xerivu.ghostwriterforsale.com/uploads/1/3/1/3/131398428/jasuxigajak.pdfIn PDF document text
    • http://files.coachtiffkelley.com/uploads/1/3/0/7/130775446/nuzona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/77145261620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3621/6229/files/jade_empire_romance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/ansible_tutorial_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/74348928141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/99095411074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/16525579066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/xapukusutowemaxereden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/91288448625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/72230158447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/99136260716.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 5

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_off00004a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A89 5620 bytes
SHA-256: ef6055d615fc1153613b2f5dbb8e791878522a1207f39bce6953f9ddd36a15e6
font_01_sfnt_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 9920 bytes
SHA-256: bd56a747021fe80131a85ac89ca304e6a659373df7e573c7a0b25a53a8aa32ee
font_02_sfnt_off00007f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F62 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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