Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6806d321a0a1d4a…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 12:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 22cc97f32c1ccdd392348d4459fa7259 SHA-1: 9b86a09f0eed70aeba8bb29411c093005b898af0 SHA-256: d6806d321a0a1d4a7de75d02739565c49d1fae04bbb75ad898a7af09dc07211f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'alphabetical order worksheets grade 3' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/pify?keyword=alphabetical+order+worksheets+grade+3 In PDF document text
    • http://files.pomphreyconsulting.com/uploads/1/3/0/7/130775286/f6547ee.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/1/0445/6969/0276/files/software_quality_assurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/82120123757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/verikoxepifom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/bekewawosesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/nopixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/asma_causas_sintomas_y_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/74531109550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/nukivufibupejuwuwipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/suzageravus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/71734232707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/sojajob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0275/7021/files/campbell_hausfeld_portable_air_compressor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/debenhams_children_s_shoe_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/pitadatukoxixokotonemofa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B84 5784 bytes
SHA-256: 0bd5a5e7f8e25973a62f0b4b99f70cbda1f3f5847f3265ea20714f24d94bc55e
font_01_sfnt_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 10024 bytes
SHA-256: d454c950170873a38ea86a20e8eb6a71ef9e9949072d79cad6e3e6e974b2d1e9

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