Malicious PDF — malware analysis report

Static analysis result for SHA-256 611cc1706a169e29…

MALICIOUS

PDF

33.3 KB Created: 2020-08-21 09:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7540bd35895a4ff1e22d376b3b6ff1a SHA-1: a5f38709b05f8dfa545484c6e618c12f904c9b2f SHA-256: 611cc1706a169e29728f0c4f41c0d493eaf56e028fcf6c8ab46d69a759189d0b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Rectangular array worksheets 4th grade' and the malicious redirector URL, suggesting a lure to disguise malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to lead users to harmful content, likely for phishing or malware distribution.

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=rectangular+array+worksheets+4th+grade In PDF document text
    • http://minasag.royalpawsmobilegrooming.com/uploads/1/3/0/9/130969723/cdb1701a236.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/1/0432/8669/1998/files/33106860042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/28926707123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/derapamezatowusopofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/zerijine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/calendario_escolar_2020_a_2020_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0783/5293/files/voxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/comment_assembler_des_gratuitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/68796280235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/xipepikepelenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/rojerotiwolisizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/bach_fugue_g_minor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/gopam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/dugufakimo.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_off00004478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4478 5556 bytes
SHA-256: 289d7d4f23354994bee8f85e0e5573b878988bc32f7aa9f03e1538137bf3a82b
font_01_sfnt_off00005774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5774 9640 bytes
SHA-256: c4bfbfb8e3918c13f72e83d0af1a562c0baf09b5cf2caef4221667b8d1b9e35a

Open this report in the interactive analyzer, or submit your own file for analysis.