Malicious PDF — malware analysis report

Static analysis result for SHA-256 a840fd6827a62edd…

MALICIOUS

PDF

43.7 KB Created: 2020-08-28 16:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cf1db86e7af6ce8d76605413c18ec34 SHA-1: e1d9601b53dcf8aa27728ef5549cf0991f93b7f3 SHA-256: a840fd6827a62eddf1863f3c84d9beba97ff9d440bf32598e0716e4d5e311553
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. This indicates a likely attempt to lure users to malicious websites for phishing or malware delivery. The document body itself contains garbled text but includes the primary malicious URL and several other PDF links, reinforcing the link farm attack pattern.

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=yabanc%25C4%25B1+%25C3%25B6znur+y%25C4%25B1ld%25C4%25B1r%25C4%25B1m In PDF document text
    • http://files.friendshcls.org/uploads/1/3/1/8/131871467/6a03116cf28c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/47147700519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/84110422103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/sanamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/wopejatajulujeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/mapa_buenos_aires_google_maps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/caudillos_de_la_revolucion_mexicana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/fifikefevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/titanic_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/mapososataximikemewawifis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/37661784654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/dotawo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D60 4856 bytes
SHA-256: 4fe28d897ef6faa65ab2669e8eaa21d0b2597ea0cdf4134e6c58f992386d1ab5
font_01_sfnt_off00006dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 11584 bytes
SHA-256: 117e164fff1d7034acfc3dbf83e6e3788425a3d483722a2d5ae2a8f977b47751
font_02_sfnt_off00009254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9254 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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