Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14f318a94628616…

MALICIOUS

PDF

47.4 KB Created: 2020-08-14 02:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac8d1b04c1ebcd78ea9d1ecd73625dc6 SHA-1: 0e598b680cf8de644c2c9d956aebc125a1620fba SHA-256: a14f318a94628616883d9e9d0f2997f4cfba510a23338f1da134bd88b20ee27f
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, forming a link farm. One prominent URL, 'https://ttraff.cc/pify?keyword=samples+of+argumentative+essay+writing+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to essay writing and the tool wkhtmltopdf, suggesting a lure to disguise the malicious redirection. The primary attack pattern involves redirecting users to malicious infrastructure through a deceptive link farm.

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=samples+of+argumentative+essay+writing+pdf In PDF document text
    • http://files.maryimmaculategallatin.org/uploads/1/3/1/8/131871614/1968874.pdfIn PDF document text
    • http://siwoko.unlimitedpotentialaz.org/uploads/1/3/1/3/131383965/832714.pdfIn PDF document text
    • http://files.pawsablyhome.com/uploads/1/3/1/4/131407692/kobowemarozopivo.pdfIn PDF document text
    • http://files.rollepodiatry.co.uk/uploads/1/3/0/8/130874585/e09b5de7bb0.pdfIn PDF document text
    • http://disapafup.rbkfreshfitfood.com/uploads/1/3/1/8/131856177/6969414.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/1/0432/0742/6216/files/tonunowatavifupewazopidan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/long_510_tractor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1762/3959/files/karowibamujudifit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1795/9586/files/centrifugal_blower_impeller_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/50660523633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/artificial_neural_network_using_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/skate_3_cheats_codes_ps3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/tebutufivimoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/mass_tag_editor_tumblr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/fojubatulovis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/47307905654.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7B 5720 bytes
SHA-256: ec8f5d78faeb3a089f76b9673888d1ae837aa8d8f27a52e8f734c7cb23a4cada
font_01_sfnt_off00008df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 10204 bytes
SHA-256: 64b2818a13dddbac6491546d13f18ce0d8a89ff7be75258b33a42ae073dd8e21

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