Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab1be6784702f0…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 11:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1007b1597e71148c771fc1ded13a1ec SHA-1: 8f0035e6e550ac88d43e3b9364b87cd85d02c8a2 SHA-256: fcab1be6784702f072f292436a1b89a226915f3a7229af9ddf71323ea14b5582
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=castle+clash+mod+apk+1.+6.+4'. This URL is likely part of a lure to trick users into downloading unwanted software. The document also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify-hosted PDFs. The ML classifier 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.ru/pify?keyword=castle+clash+mod+apk+1.+6.+4 In PDF document text
    • http://files.arisecoalition.org/uploads/1/3/1/3/131380292/gixaj_velijutatadube_gixamelepoderef_sozamejopigiz.pdfIn PDF document text
    • http://files.holisticcoachsg.com/uploads/1/3/1/4/131453818/0716fc8ac.pdfIn PDF document text
    • http://files.sovereignfoodie.com/uploads/1/3/1/4/131406826/dazilo.pdfIn PDF document text
    • http://files.nicklasart.com/uploads/1/3/1/3/131398264/wevone-sevefapakoneful.pdfIn PDF document text
    • http://files.sarahrileyceramics.com/uploads/1/3/2/8/132814250/wopida.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/1/0436/9914/2810/files/jiladiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/antecedentes_derechos_humanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/72320908122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/factors_affecting_consumer_buying_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/27823774553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/gta_san_andreas_cheats_free_download_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/97627563521.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
🗂 Part of campaign: gregstensonwriter.com 5 samples

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_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5512 bytes
SHA-256: 97560041e6e5484c64542b888c5a5fdc3fc0f688b470d5c82d0a98e822a93a4d
font_01_sfnt_off0000720c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 10256 bytes
SHA-256: 0e8b1a74d4e73d8eab78b0ab5f74603ca86d84aff03e990c43eb818f2ac18f8e

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