Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b57d0c9abaa2422…

MALICIOUS

PDF

56.2 KB Created: 2020-08-19 00:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c563417770a6ebcffd2ae872626b027 SHA-1: 1c3c4bd6351107f34f9d6aa1752155f0be744970 SHA-256: 0b57d0c9abaa242295a347bb71c46c98acbfc3a0ace19f1f9cbe3f1d8096cf7f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) disguised as a free download for stress management worksheets. The ML classifier and redirector heuristics strongly indicate malicious intent, likely to phish for credentials or deliver a secondary payload. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=stress+management+worksheets+for+adults In PDF document text
    • http://files.nosilafacepainting.co.uk/uploads/1/3/1/1/131163691/7c03361774665.pdfIn PDF document text
    • http://files.unlimitedpotentialstl.com/uploads/1/3/0/9/130969080/720983f.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/1/0431/3900/6615/files/neuroanatomy_through_clinical_cases_blumenfeld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/95173471130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/38567386809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2887/3367/files/wimajonivoredezexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8574/9654/files/79515857040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/13302309071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/xoselenemotel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.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 3

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_off00008f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3F 5412 bytes
SHA-256: 25edac1e5145f048b6eb09330d3472bc2944cda0b78a0a6eaacc1eb438efc37f
font_01_sfnt_off0000a17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA17F 10596 bytes
SHA-256: e219ab8ac00f47704cdda0138690718c4284a1f6e72d133aa202533e96f69d46
font_02_sfnt_off0000c59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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