Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b48d6c7df49f22…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 21:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a245254f3b846cc1b28c663cc9210763 SHA-1: c64e73ba2def1e6726967fb0f6314daa73720695 SHA-256: d7b48d6c7df49f22c1a3c5ada00d16238cca6fe70b5eb148c5fc415b6140d645
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic identifying it as a link farm. One of the primary links directs to a known malicious redirector service, ttraff.cc, which is likely used to obscure the ultimate malicious destination. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

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=tableau+desktop+certification+study+guide In PDF document text
    • http://files.grdroofremoval.com/uploads/1/3/2/8/132814097/4dc143f.pdfIn PDF document text
    • http://files.shopkattandblouse.com/uploads/1/3/0/8/130814623/4428457.pdfIn PDF document text
    • http://files.katherinebelisle.com/uploads/1/3/1/4/131409090/fozavakarajewonaf.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/1/0433/0484/5465/files/appointment_letter_format_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/xibogujirewuwapera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/51861230444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/gijimipamiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4550/6459/files/canon_in_d_piano_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/champva_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/kibafidiwufupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/dokoburixaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/vufafatekutaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/lejewubewalalo.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 2

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_off00006720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 5580 bytes
SHA-256: 1954bea0f3cbe8ff603c15cdff675af2907a4122499bea3da8f1c6473e6cadbf
font_01_sfnt_off00007a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 10612 bytes
SHA-256: a8deae2e5a1e4ddbb5e8575a8dc43a803e8d2f70c79a39c027422d1d426c9de4

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