Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4840f24a391081…

MALICIOUS

PDF

54.4 KB Created: 2020-08-15 22:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5835684e35ea2cb690cc5508653d234 SHA-1: e33cd22ac92d6b5778a2085a59246a74468188f9 SHA-256: dc4840f24a391081166342c8a6195c9209847b8c685d36ba3b9613404b374f8d
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, pointing to 'https://ttraff.cc/pify?keyword=apache+open+office+presentation+templates'. This indicates a phishing or social engineering attempt where the user is tricked into clicking a link that leads to malicious content. 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.cc/pify?keyword=apache+open+office+presentation+templates In PDF document text
    • http://tosed.oursouldoors.com/uploads/1/3/1/6/131607000/8065223.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/1/0431/6076/4576/files/18211329223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/2573435506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/42nd_constitutional_amendment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/fesovadinejivuxofoxajif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/88453763106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/weduwumabolajufonitetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/foxofopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/ncert_biology_class_11_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/2953885250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/71852659461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/92685652949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8782/1981/files/18041401004.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 1

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_off0000931c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931C 5244 bytes
SHA-256: 89cdb8e7319c82eae825b4899bcbd709c3bc6220beed376826c3fe97577ce1b0
font_01_sfnt_off0000a4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4BB 11868 bytes
SHA-256: 189448548bdfd68b8234c3c9aa6c36b717e2b60b0d5d3b769d9cf1733abe2a9c

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