Malicious PDF — malware analysis report

Static analysis result for SHA-256 c378353bd8732594…

MALICIOUS

PDF

65.9 KB Created: 2020-08-08 01:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9d325648d193a75d321cd36f7d1fc04 SHA-1: 65ad583dec76be83c59172d547189486251efc4a SHA-256: c378353bd87325945093d727b7356a4747e502da057046f0dba52aa07fa52f2e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text and embedded URLs suggest a link farm or SEO spam tactic, likely designed to drive traffic to malicious sites or potentially distribute further malware.

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/pify?keyword=single+nucleotide+polymorphism+pdf In PDF document text
    • http://files.marryandtuxbridal.com/uploads/1/3/1/0/131070500/somubitipu-lanijazawudox-padupatu.pdfIn PDF document text
    • http://files.badgerbuildingmover.com/uploads/1/3/0/7/130739564/sukebatufulotexepi.pdfIn PDF document text
    • http://lolizub.tallsprucefarm.com/uploads/1/3/2/6/132695492/b7af285cdda3.pdfIn PDF document text
    • http://files.allencblack.com/uploads/1/3/1/6/131606605/8577335.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/1/0432/8580/7269/files/waluwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5015/files/52373957188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/73713426186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7055/files/xasedudulapusipakutuverat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/67857946527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/16102787703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9496/4392/files/blob_type_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/79369984867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/reragum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/sakugitunosafelegaseto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/sugamagamawetobeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/31436709130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/34527812070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/dopaxamuwesufonome.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_off0000c20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20E 5564 bytes
SHA-256: c6c89d7d5354049b30429d81cb4bafdb0eb0a0fd4f6919df73fecf54df6beb80
font_01_sfnt_off0000d4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DC 11000 bytes
SHA-256: feb7213bc1e149f0aef4a53d7f0d539301eeee698fb52678f8f616a1a372824c

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