Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0acb567a7f485d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-15 07:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ffc380b2f52f388c7a59a76b9290a65 SHA-1: 0a9a6f7f9ba6d94e35455bae0c63fefe36fee241 SHA-256: ef0acb567a7f485d8e1ec0d16c6521d6d6a5cb128cc5e64bd957877a03e3d191
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a PDF download lure. The heuristic firings confirm the presence of malicious redirector links and a link farm designed for SEO manipulation, indicating a phishing or scam attempt.

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/wb?keyword=gendered%20lives%2013th%20edition%20free%20pdf In PDF document text
    • http://files.memorialbusinessday.com/uploads/1/3/1/3/131380547/991bf83a89.pdfIn PDF document text
    • http://files.movement-arts.net/uploads/1/3/1/1/131164479/kezuruxawa.pdfIn PDF document text
    • http://files.joywinsdammit.com/uploads/1/3/1/8/131858592/ferufemufuwive.pdfIn PDF document text
    • http://gevaripe.samuelesegat.com/uploads/1/3/1/0/131070767/6634454.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/1/0436/1699/3440/files/zuwukosubuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1955/1388/files/73558300271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/nelopeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/puwazawozugodup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/46965592545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/ziduliposa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/annabel_lee_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/autonics_absolute_encoder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/61441880615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/velunogutisijotedalikevup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/aruba_iap_315_datasheet.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 8

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_off00004b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7F 5016 bytes
SHA-256: 3c2feee714a11fa73745d8de817a1225484ef2c117692decdab16d6b58fa0af5
font_01_sfnt_off00005c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C95 10796 bytes
SHA-256: 0dca2a36576f6b5a59a96c79b08db61a63c8d3e9907e9391eb650b22135858f1
font_02_sfnt_off00008069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8069 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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