Malicious PDF — malware analysis report

Static analysis result for SHA-256 c357c38bf445aa3b…

MALICIOUS

PDF

54.2 KB Created: 2020-07-27 20:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff0811cd1d2cd17d5ffafc469f529b1d SHA-1: 14821ac186f7b7eba969b3eae27e5d036e7258e7 SHA-256: c357c38bf445aa3b72a5a39480254618a3a9c2c4e60f8426a1395bdebc3de86b
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 links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. Another heuristic flags a link to a known malicious redirector. The document body is heavily obfuscated, but the presence of these links strongly suggests an attempt to manipulate search engine results or redirect users to malicious content.

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=endospores+are+usually+induced+to+form+when In PDF document text
    • http://files.littlepinkhousesproduce.com/uploads/1/3/1/1/131164046/bidid.pdfIn PDF document text
    • http://files.thebeautybarnuk.com/uploads/1/3/2/8/132814364/340859.pdfIn PDF document text
    • http://files.kel-a.com/uploads/1/3/1/4/131453213/ba3ea64e779.pdfIn PDF document text
    • http://files.greatislandgardenclub.org/uploads/1/3/1/3/131381288/duwufegenasiv.pdfIn PDF document text
    • http://files.heartofagiant.org/uploads/1/3/1/4/131482931/57e57b.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/1/0431/3654/9018/files/10792968724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/sivizifexovagedelaxonoxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/72834703422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/tadurokariwatekale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/32158996385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/dokolijamofumamilokugiraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/14705153709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/fusiwevegosepupadoludum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/1684072370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/daxozunowipol.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 7

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_off000095bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 5428 bytes
SHA-256: 0af0ac0172c4506c9ddc7269f9d2564cd752c0862d33a64dabb4343203699919
font_01_sfnt_off0000a81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81D 10240 bytes
SHA-256: efdeea326dcda7d9ecb5ef0d49ebb54ee13418d88767dc219b251d4fa0d30e72

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