Malicious PDF — malware analysis report

Static analysis result for SHA-256 387ee655b0b36259…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 19:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df8f5fe401c37c2bfe0b00289388686a SHA-1: 9f9592caa39df5f0de5fd1b30fabd4f8be9523af SHA-256: 387ee655b0b362594e7382db07be15495c86f5a4a5e40803e48eb13a2ed3c1ea
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. The document body, though heavily corrupted, contains the same book title and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=mentes%20poderosas%20libro%20completo%20pdf In PDF document text
    • http://files.sylvanbeachfestival.com/uploads/1/3/1/1/131163559/3706158.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/1/0437/9063/1064/files/28939876546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/carbon_cycle_steps_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/lead_acid_battery_chemical_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/gosadumofegesuwevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/rikixobazijuzisuvakojub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5542/3383/files/79692660558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/denemipanodubelubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/children_handwriting_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/rekesobinapuvurewave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/fovidanaduvufifuv.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 3

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_off00006079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6079 5448 bytes
SHA-256: 8bce96048870f4bc32e0ac35ff15d62e59ddc11b9a0b98ba66a0695e1b7aeeba
font_01_sfnt_off000072ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EA 10292 bytes
SHA-256: ac41d272d27b3e36fbe426829f15dae0cdf09a704053136304bc9c20226a23eb
font_02_sfnt_off0000965c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965C 16380 bytes
SHA-256: 50fa7af27c25b128d6dc03f2102504a514153a9bc8f7f9528091362b98e8f6b4

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