Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fc9167021d16c1…

MALICIOUS

PDF

70.6 KB Created: 2020-08-25 07:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23961e097d0d1c6869551d87f6ced196 SHA-1: 91527b0867045c4cb2af60c5dc28846d295f5801 SHA-256: d4fc9167021d16c111cabcc01a3a6bd5f207fa6a427ce2edbda6aa3a52a90f42
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, the ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure. No scripts were extracted, and the PDF structure itself does not indicate further malicious activity beyond the redirection.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=aashiqui+songs++starmusiq In PDF document text
    • http://bunodaxal.gelman308.com/uploads/1/3/1/8/131856772/sovatosa-fovolerozar-gaveba.pdfIn PDF document text
    • http://files.vincentianspca.org/uploads/1/3/1/0/131069893/8046521.pdfIn PDF document text
    • http://gobole.littleduckscompany.co.uk/uploads/1/3/0/7/130740082/rafitipis.pdfIn PDF document text
    • http://files.theclaylion.com/uploads/1/3/0/8/130813692/nerilirujake-wewapizopoxa-vuzipelur-vokab.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/1/0452/6155/3825/files/armitron_wr330ft_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8725/5970/files/ashmore_park_nursery_ofsted_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/mutiwebikeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/accumulation_of_capital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/22001391890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8091/3830/files/wepitarekomowolozemefalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0878/4541/files/1811629236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/foguxudurorokuwozadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/cdc_influenza_report_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/vsphere_6._5_u3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/barbie_full_movies_in_tamil_dubbed.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 3

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_off0000caf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF9 5180 bytes
SHA-256: fa43c2260054a3a49c03461802a54d765823fd37f1eccff43bc189729cda2703
font_01_sfnt_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 16140 bytes
SHA-256: 8b9ed8face3308ebd14f09e415b2c9eb31fab33038d4a8d9d8e892584fb46537

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