Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bc9a1228a6d8fc…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 20:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 910fe9280d69b86abc2d5c7b7cdcbfe2 SHA-1: fc1a4fe9e2ce478b1a533197eee2a4f475661790 SHA-256: a7bc9a1228a6d8fc07d0b90c42638ad00c98ca8d02b101fe7c18654e74b0b9d6
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to obscure the primary malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=calendar+worksheets+for+class+2 as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure.

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=calendar+worksheets+for+class+2 In PDF document text
    • http://vilite.leanwithluke.co.uk/uploads/1/3/0/8/130874575/6249439.pdfIn PDF document text
    • http://files.creative-tree.co/uploads/1/3/1/6/131636728/ac97e043.pdfIn PDF document text
    • http://fumud.conductorbeverlytaylor.com/uploads/1/3/0/7/130740514/pevuzudabax.pdfIn PDF document text
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.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/1/0433/7513/2824/files/berapolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/kevuwipozolelifozoragawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1065/2317/files/gujipilidajapap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/gatodefemozugeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4100/3432/files/steelseries_arctis_7_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/70972033130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4548/4706/files/mac_pro_longwear_concealer_shade_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/54277156543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/essentials_of_clinical_infectious_diseases_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/xekeraxixubilokadije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/39256232157.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_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5304 bytes
SHA-256: 5de0b008002de3e6f14f350d981f34f1d399847e0a3ac4faec3917cdb422e8df
font_01_sfnt_off0000790a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 10308 bytes
SHA-256: ba6f9d7a2605a1367813d8975fcc14976e2491410bd51db5601ad4a45980df08

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