Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfff5d235d739ab…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 05:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a69c08e4acfd0c46512640f67530b1d SHA-1: eb213c55912a7690bfde3ae090a17f632bed805a SHA-256: 9dfff5d235d739ab5fb2a060f016ac7e8808c4baef5816bca27816f82063e753
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text referencing 'Uc browser free apk pc' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The presence of a malicious redirector link is the primary indicator of malicious intent.

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=uc+browser+free++apk+pc In PDF document text
    • http://files.recycledmindsimprov.com/uploads/1/3/1/3/131383651/pesonet_vidizawatadewa_tezidarul_mojesaririv.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/1/0429/9161/6153/files/namakam_chamakam_telugu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/uva_darden_employment_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/android_emulator_proxy_vpn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2352/8099/files/91510612422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/periodicity_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/44401550624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/22943647481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/guxidedufujizudizodijov.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 1

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_off00005d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 5264 bytes
SHA-256: cd3e843731c0b90518333a15043070f7433f9ddd09db1ffd4b90040e679c1f92
font_01_sfnt_off00006f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 11324 bytes
SHA-256: 14f0b87a67a03425f57b0033f67d1eb1bebf99fc37d620bdba49fca855e2ba59

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