Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f2f3afbd6584d6…

MALICIOUS

PDF

59.2 KB Created: 2020-08-02 14:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0870cb7a8f1b883c951b6d9e83bf37a2 SHA-1: d60ab537f68258c8fc6f48c627274ee73f33126e SHA-256: 86f2f3afbd6584d657a476d5375e00764b0f57fefb492161347652c9a4aeff7a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which lead to a redirector service identified as malicious. This suggests the document is part of a link farm or phishing campaign designed to direct users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=3.+3.+5+resto+druid In PDF document text
    • http://files.revivalhub.eu/uploads/1/3/2/7/132710669/8218380.pdfIn PDF document text
    • http://files.browardcountyacf.com/uploads/1/3/1/1/131163996/9186431.pdfIn PDF document text
    • http://files.centerpointutilities.com/uploads/1/3/1/4/131453284/4391073.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/1/0436/2836/3939/files/najuzovodopizufolis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/18365112078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/9756917230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/34811168898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/mososonekawigovasot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9573/5963/files/rojofobuwavilitedujoxuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/walevisamuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/zitirajafomufelidoriseje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/18339800158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/lujepiguruvalojedunoketaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/sanuvewuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/amazon_app_store_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD9 4800 bytes
SHA-256: 8889d6035c6316aafdb2246d158991069c967d0e6425dc2b8e0bea4e32259e7e
font_01_sfnt_off0000bc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC41 10636 bytes
SHA-256: 49ab38fa0222ce96e0e25b46d421b023580273d61cc42c0d6706ff492c109fd2

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