Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3c7db39ff55f72…

MALICIOUS

PDF

50.9 KB Created: 2020-08-21 00:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20cc91aaf44c3ac9e137685562353b84 SHA-1: dfe10f91fcfd81037be0a7a581e645bbe53059fb SHA-256: fa3c7db39ff55f7232472af6a98788a56e61cb22b1c11dbffe70f8e77559e1b7
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=android+modbus+rs485', is designed to redirect users to potentially harmful content. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier also strongly indicated maliciousness.

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=android+modbus+rs485 In PDF document text
    • http://files.lindapeterman.com/uploads/1/3/0/8/130874521/cd1891d9b1.pdfIn PDF document text
    • http://dimato.gregwehmeyer.net/uploads/1/3/0/8/130874519/5289631.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/1/0441/2994/3704/files/advanced_excel_charts_and_graphs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/67316021435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/latest_nokia_android_one_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/89884407650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/xazenitaduwikuxoburux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/nibaverizesurosewised.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4233/8981/files/rifideriwuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/curso_de_ingles_iniciante.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/zatutekobiveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/mending_enchant_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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 2

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_off0000893e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 5264 bytes
SHA-256: 70729a4c83ab8d4f8b28c826bc027d0584fb0f7453dae178f230260fd1bd722a
font_01_sfnt_off00009b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B13 10664 bytes
SHA-256: fc58210bb6a9b254b7fcbb6922b7593fca66fd115b2ba0f716f0e41f30b7ea3f

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