Malicious PDF — malware analysis report

Static analysis result for SHA-256 da990e5d956980c9…

MALICIOUS

PDF

52.0 KB Created: 2020-08-11 00:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5651991ea2cb76f0ebefeea800fd9317 SHA-1: 8304e5945117c0c8d9a8d1dd334dd16b262046ee SHA-256: da990e5d956980c90b501f6814d0f91316dd306af58153922d9c901969a4311f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=angles+of+depression+and+elevation+worksheet+pdf`. This URL is embedded within the document body, disguised as a worksheet title. The presence of numerous other external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary intent appears to be redirecting the user to a malicious site.

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=angles+of+depression+and+elevation+worksheet+pdf In PDF document text
    • http://files.donnadeforbescreates.com/uploads/1/3/1/0/131070165/1842442.pdfIn PDF document text
    • http://files.sahiphopawards.com/uploads/1/3/2/6/132681749/danogowewofodubulu.pdfIn PDF document text
    • http://gedataroj.cambridgeburlesque.co.uk/uploads/1/3/0/9/130969204/wameni.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/1/0432/3917/8399/files/i_can_read_biscuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/palatekalozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/istvan_banyai_zoom_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/31659444270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/speaking_english_fluently.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1614/3526/files/business_email_writing_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/72094416901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/phonemic_awareness_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/95864412657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/analogy_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/92176773664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/cambios_psicologicos_en_el_envejecimiento.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_off000080d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off00008acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 5508 bytes
SHA-256: 55b37f7f7181d06549bdf05541d436a7c3c6c07d1bdae2bae447156d494488b4
font_02_sfnt_off00009da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA3 10000 bytes
SHA-256: 153c0ef7af81474e122624970314c42d66995dde8d20bc46d8ed5e0051d5ee5a

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