Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd398c18d1ab343f…

MALICIOUS

PDF

57.4 KB Created: 2020-08-02 01:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d456e1a7bb32dd3d0949d4e61b31aefa SHA-1: 0d5683d84218ca55b905d5524349613c691b04a1 SHA-256: bd398c18d1ab343f4a304caa961d16b5e31b41410b63284056da734864cdc1f8
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 URLs, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. Another critical heuristic points to a large PDF link farm hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users through these links, likely to a malicious payload or phishing site.

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=coffeescript+iterate+array In PDF document text
    • http://files.richardnicolson.com/uploads/1/3/1/4/131453109/lidomo.pdfIn PDF document text
    • http://files.amandaghahremani.com/uploads/1/3/0/8/130814611/25d4e.pdfIn PDF document text
    • http://files.allimagesonline.com/uploads/1/3/0/7/130739628/90f48ec.pdfIn PDF document text
    • http://files.pglargyll.com/uploads/1/3/0/9/130969312/ba906.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/1/0430/2422/0321/files/wejewupopibadil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/jarusegefaxowurugobuzekux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/23794954326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/63539714274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/27798947439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/58753041913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/42959010183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/79046882247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/61008413274.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00008e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E70 4984 bytes
SHA-256: e8344f77a729ee9d227fa7e416082ceb510a5f94376cf4c935a3a27ae185e192
font_01_sfnt_off00009f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7F 10260 bytes
SHA-256: f9d57900c7aa0878076be07b17669e38ffc437d83916b2468ef5dea7a742025a
font_02_sfnt_off0000c2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C3 16352 bytes
SHA-256: 9cb0650af5bdb2e8593988a361a40fe1030b61ea25d8fce7fab67310e0b1f9a7

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