Malicious PDF — malware analysis report

Static analysis result for SHA-256 211cdaacab5368e3…

MALICIOUS

PDF

52.8 KB Created: 2020-08-10 13:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b17e3a974bce3c9ff704f2a6c20516b SHA-1: d76c4505831ecff66786de3f78b37b2a7bfc6bda SHA-256: 211cdaacab5368e3916d7666744b6afa099f6c9aff1709455de9201169328d8b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to '6th grade reading comprehension worksheets pdf free'. This heuristic indicates a social engineering attempt to trick the user into visiting a malicious site. The PDF also contains a link farm pointing to multiple Shopify-hosted PDFs, suggesting an attempt to appear legitimate or to distribute further content. No scripts were extracted from this sample.

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=6th+grade+reading+comprehension+worksheets+pdf+free In PDF document text
    • http://files.poweroftheflowers.com/uploads/1/3/2/3/132302787/nufopixefugif.pdfIn PDF document text
    • http://files.philiphall3197.com/uploads/1/3/1/3/131380337/pojosifavi.pdfIn PDF document text
    • http://files.hjdbc.com.au/uploads/1/3/1/6/131637814/0f91d.pdfIn PDF document text
    • http://files.theballstrikers.com/uploads/1/3/1/8/131856771/dogenavusegolabo.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/1/0430/0436/2906/files/86559406129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/kinemokeketodivopijax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/51998749672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/25505839510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/36244717666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0968/3106/files/advantages_and_disadvantages_of_computer_in_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/71627344254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1276/3298/files/jpeg_to_ico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/dakexesilawaruxonowale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/bapazirivolopikoxukofebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4294/6715/files/grammar_practice_book_grade_4_harcourt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.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 6

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_off00008ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA9 5752 bytes
SHA-256: eadc7f745b7e746b8f616bf9f631851d6f80e3e07d9185b207deec90e2ef7407
font_01_sfnt_off0000a01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01F 10368 bytes
SHA-256: a5f4cd9cb46d16579c14906780dcdd9b8bd87148babe56ef226ae6c6bf294176

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