Malicious PDF — malware analysis report

Static analysis result for SHA-256 0956396c1760f331…

MALICIOUS

PDF

39.3 KB Created: 2020-08-11 20:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3f9fb1830df60db4649824c3b30461a SHA-1: d4948d8d61abfd5928d2d0cc89a19fceae6c33ba SHA-256: 0956396c1760f33163f008a0ebff9eb59782233f42fec4505374a87f87df6768
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body and embedded URLs suggest a phishing attempt, likely to trick users into downloading further malicious content or visiting a compromised site. The ML classifier also strongly indicated maliciousness.

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=ctet+2020+notification+pdf+in+telugu In PDF document text
    • http://dezabi.kierstinbible.com/uploads/1/3/1/6/131606289/fcff9.pdfIn PDF document text
    • http://moxasozu.remycenard.com/uploads/1/3/2/8/132814930/nedojumutoxevoda.pdfIn PDF document text
    • http://files.emeastrategy.com/uploads/1/3/1/1/131164081/40d236d33ce2f6.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/1/0437/8879/6064/files/56052003773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/online_rent_agreement_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/xominu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0826/0258/files/positive_emotions_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/30421601268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/7564297265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/wits_bsc_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3243/files/calendario_escolar_sep_2020_a_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/dakoxutavofijerabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/toliwanetapumezota.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_off00005bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF7 5228 bytes
SHA-256: 6c758d0fd721426d3b942f4175e8d0ae4332e87dc403a6ec94fcf1f6624df101
font_01_sfnt_off00006dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10184 bytes
SHA-256: 62215d6a5d388c1d52531344e04ab595cef0e2d68301d9fde0ad4a018b712a1b

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