Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7cecb7aad85a1e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-16 17:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3dd49ccde976a8f756995e5e76ea862 SHA-1: f23482a8340c53a4b12b7469b140d414e6ca6986 SHA-256: 1c7cecb7aad85a1ecbd67671ef26ed9db349ac75d010b512d828acad19b1196e
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 pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'best brain games app for android' and the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious sites.

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=best+brain+games+app+for+android In PDF document text
    • http://files.the-authorscorner.net/uploads/1/3/1/0/131070912/bonuripofi.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/1/0433/7709/8913/files/16661032780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1523/3959/files/chronological_order_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/concept_of_economic_planning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/luzixefagobudutak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2171/4076/files/27074237244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/gegodonomidutigivejatewus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/rukelitowavugufogikivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/libro_el_aprendiz_de_brujo_pnl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1289/4374/files/nelson_mandela_speeches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/natezomaduxusolatiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/zigudamusej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/tijidatemezideporedinad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7191/7471/files/xavanofagetevilotubaxoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/futimulas.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 3

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_off0000901c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901C 5516 bytes
SHA-256: ab07da1c352e1ab8e31c5cdf617c6fa9d78270ff876051d1bf333d83828b3c79
font_01_sfnt_off0000a2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BE 10164 bytes
SHA-256: 0cacd07caca90b925e6ffaa7a7ad296a459d49627b8af3a420410fd5597c4588

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