Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2fc70edfb84c9c…

MALICIOUS

PDF

35.7 KB Created: 2020-09-18 11:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d7568f3fc5d431d946ec95791c31cbb SHA-1: 0fda5eee4af32438feb05c49a7ae32124e05f0d8 SHA-256: 8d2fc70edfb84c9cde2c2a4be2a8a94d41c18c79dbe68c48188890a8cf2b7d56
134 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a worksheet answer key, which serves as a lure. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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.me/wix?keyword=theoretical+and+experimental+probability+worksheet+12-7+answers In PDF document text
    • http://jefoporog.myexpressionsoflove.com/uploads/1/3/1/4/131453170/vukir.pdfIn PDF document text
    • http://files.tribalme.org/uploads/1/3/0/7/130776164/5083694.pdfIn PDF document text
    • http://files.paulforattleboro.com/uploads/1/3/0/9/130969545/4651321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9fb87794-7f59-46b0-afbd-383bcc5b15c4.filesusr.com/ugd/6240f8_45037d8508d7446183992dcd92de95fb.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/24034008343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/surah_ar_rahman_with_urdu_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/tovarirezuziwanofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4924/6110/files/java_eclipse_mars.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_off00004b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B44 6024 bytes
SHA-256: 04b8f689c998b169585636492a658c67e99ac4b25cab9463d07f578c16c9730e
font_01_sfnt_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 10132 bytes
SHA-256: eab14d5a5ddd69891a505445b102e1f13533ea469d8cf3f5f799dd6e65efdfac

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