Malicious PDF — malware analysis report

Static analysis result for SHA-256 39315cf8017ff6a3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-06 12:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb21209ef4f1e3326888e0e354dac756 SHA-1: 900d3709f1e8a84b39ceebb876b5c251e2da694a SHA-256: 39315cf8017ff6a336e8de8211933c620222c3f0f9908f9c2a39a1e8df7d4863
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, contains text related to learning French and the URL itself, suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the presence of numerous links points to a link farm or redirection strategy.

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=aprender+frances+con+pronunciacion+escrita+pdf In PDF document text
    • http://files.pawsitive-dog-training.com/uploads/1/3/2/7/132740377/6fd1ba.pdfIn PDF document text
    • http://files.lovingtonfire.com/uploads/1/3/2/6/132695663/fosogedawajirobax.pdfIn PDF document text
    • http://files.nod-production.de/uploads/1/3/0/7/130776118/3864674.pdfIn PDF document text
    • http://files.callieraebowtique.com/uploads/1/3/1/8/131857758/fcade0e16cff3d.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/1/0441/4029/8392/files/surat_al_kahfi_latin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/75223527653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/5221870582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7555/0876/files/kanajuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/classification_of_african_languages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/various_forms_of_energy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/5263752914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/leropepuzimofir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4201/1293/files/geometric_sequence_kuta_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/pool_of_tribute_extreme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/98351018510.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 8

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_off00007530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 5104 bytes
SHA-256: d016b123daa61377a95ff7bdf271da632a3fac0b72e21d71b8105ec5b230ed57
font_01_sfnt_off000086a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A1 12920 bytes
SHA-256: 9c64457b39422828dd1dda94ab88318ace168267cebb5220f4504dc0cd64e88c

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