Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4f8f1513f9f2b4…

MALICIOUS

PDF

137.9 KB Created: 2020-08-10 08:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2aa3970d9214e98e6cb12873a06b0b63 SHA-1: 8db7b77d66bc695be33774c18a305b05a880998f SHA-256: 1c4f8f1513f9f2b4dca5d881d66cdb189c1106d30eff96b3d43ddd1baf291a47
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'History of english literature pdf book' and the malicious URL, suggesting a lure to trick users into downloading malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=history+of+english+literature+pdf+book In PDF document text
    • http://raxoletev.beadedbraceletsgalore.com/uploads/1/3/0/7/130775413/250669.pdfIn PDF document text
    • http://zugudesid.flatheadlakemassage18.com/uploads/1/3/1/6/131636655/50a50.pdfIn PDF document text
    • http://files.alittletheologyontheprairie.com/uploads/1/3/1/4/131437446/f41a0b2a4.pdfIn PDF document text
    • http://files.pettyharbourmaddoxcove.ca/uploads/1/3/1/6/131636965/caef74ceed2fc1.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/1/0440/7151/8373/files/83267763432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/soduxodezawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/58287717033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/bak_mei_kung_fu_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/68994888120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/507559681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/basic_isometric_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/reporafulupadefawaragor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/90322014190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/guxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/kabatar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/paximasedunujigidavekuro.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 7

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_off0001d48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D48B 5572 bytes
SHA-256: e1084680221f7d47549cfc75141d3e5712be5434f2f7d40a8c17590bad3e6fd1
font_01_sfnt_off0001e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E774 16356 bytes
SHA-256: 3220efe78185babed88c897f60f6f48b209f58b2c372434ed2a17b0a6feb0135

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