Malicious PDF — malware analysis report

Static analysis result for SHA-256 376da2f4437e2abd…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 04:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b63f2b8bed54a6885ebe86dbf2ec9f6f SHA-1: 6560a502799aa4497455294d82eb8d524b638d57 SHA-256: 376da2f4437e2abd6dba0ee524a0af106c942381613543edb124583d580071a0
194 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous external PDF files, with one URL pointing to a known malicious redirector. This indicates a likely attempt to distribute malicious content or phish users by directing them through a series of links. The ML classifier also strongly flagged this PDF as malicious.

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=adulthood+is+a+myth+sarah+s+scribbles+pdf In PDF document text
    • http://files.josesaladbar.com/uploads/1/3/2/8/132815190/9880060.pdfIn PDF document text
    • http://files.carolinevanthoff.com/uploads/1/3/2/7/132741385/aacefb42a4.pdfIn PDF document text
    • http://pikedowi.hotseatcustombaits.com/uploads/1/3/2/8/132814930/4215888.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/1/0432/8954/2809/files/54790941859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/axiomatico_greg_egan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/wujixegipopuzesajukozul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/turawagogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/72929590149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/43354114221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/lonok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/nopuvekirinalonadupom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/mufogedalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/ludujev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/jelunowerokopemaliwalud.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_off00005ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF8 5628 bytes
SHA-256: cc7c9428cdeb289854b10589b12d6ce78af39c004c79bc3b87f47cfe7d9dc718
font_01_sfnt_off000071f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 10368 bytes
SHA-256: 56c528fc89aff6e194aac36ab36d5a1aaffbce384e4cf4c7b0ee26315deaa157

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