Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11ed88de4973fd6…

MALICIOUS

PDF

38.4 KB Created: 2020-08-18 21:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3701d691dca63cebdbe2f2e5f22a213 SHA-1: db6541703da5e3c14d17f03165d6e48134ff4c42 SHA-256: c11ed88de4973fd602107eee61835471915d899a073941826368e5c040933290
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.com/pify?keyword=punctuation+worksheet+for+2nd+grade, which is presented as a worksheet. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs and appears to be a lure for users to click on malicious links.

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=punctuation+worksheet+for+2nd+grade In PDF document text
    • http://negupas.edtc517.com/uploads/1/3/1/4/131409909/67436ad7.pdfIn PDF document text
    • http://files.knightprideproductions.com/uploads/1/3/0/7/130740212/9553610.pdfIn PDF document text
    • http://wagikoj.actscc.net/uploads/1/3/1/0/131070500/labixej-wilubofamorax-sidafotu.pdfIn PDF document text
    • http://misinepal.silverfernevents.com/uploads/1/3/0/8/130874063/timofuruzek_fedat_kudinixotonune.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/1/0430/9309/8660/files/vuduposodadipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/17507874725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/g_i_sheet_size_and_weight_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/63362574338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/62680566773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/flowers_for_algernon_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/45588152983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/93482239815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/riwoxipukitow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/indoor_air_pollution_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/lulew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/11280816329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/17423829299.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 4

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_off000056df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56DF 5540 bytes
SHA-256: 5f9cf10b2e165837b211b28dae2146eda38875f24aa491518f4949ce2ee7788e
font_01_sfnt_off000069be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 10272 bytes
SHA-256: 185371f922453f1dc0a70f66a8f231deac0e2a927dfccfbe2e05c0a8b4da4269

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