Malicious PDF — malware analysis report

Static analysis result for SHA-256 8270ce18f2d7c895…

MALICIOUS

PDF

38.0 KB Created: 2020-08-21 14:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c344efd12d9a8cf4cea81d962f846aa SHA-1: fd8d8122de870d2762e0857978a5b40dc8f5e050 SHA-256: 8270ce18f2d7c89554742a05ad494e584bb90063673ba62f2414e05e853c3b28
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by a machine learning classifier and heuristic rules indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a worksheet and includes the malicious URL. The presence of numerous external links, many pointing to Shopify, suggests an attempt at SEO manipulation to drive traffic to the malicious redirector.

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=logarithm+rule+worksheet In PDF document text
    • http://files.litvaklab.org/uploads/1/3/1/3/131380288/rukonu-rozida-vivijuma-sasuwiwi.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/1/0432/7846/7222/files/6408457534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/18873878980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/54465566586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/audi_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/ruxejadezakupifetesorajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/causative_exercises_4_eso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/wanting_memories_satb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/advanced_life_support_manual_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/putekanatikotuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/aadhar_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/7356644851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/27657067032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3135/4774/files/78919393892.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_off000056c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1 5196 bytes
SHA-256: 5628a4f3772859dcc9515048e6b69ba771d5a76674839a11dcc51dda22bd5a47
font_01_sfnt_off00006861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 10192 bytes
SHA-256: 0b25837c696d576df4ec7376ea81600d8523d1991f18b161130bcde3529437aa

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