Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a24d3520d5d315a…

MALICIOUS

PDF

48.0 KB Created: 2020-08-23 18:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c184ef138fcf060873c9926ea3cce688 SHA-1: c8f96c476c5f9f0063d8223b308544ac90bb0c01 SHA-256: 1a24d3520d5d315aeb7b813cc485b8f9e6704eb6bf25aeb9d1b889970599e2ef
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to a malicious redirector, ttraff.cc, which is designed to lead users to download cracked software. The document body also contains the same lure text and URLs. The ML classifier strongly flagged this PDF as malicious, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation to increase visibility of the malicious content.

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=adobe+audition+cs6+full+crack+gigapurbalingga In PDF document text
    • http://files.susieruthscott.com/uploads/1/3/2/6/132695347/vodinusox-dojefakun-kezevatu-zuzawudixu.pdfIn PDF document text
    • http://soburaja.jodynixmusic.com/uploads/1/3/0/8/130814995/8857830.pdfIn PDF document text
    • http://files.renaissancedress.com/uploads/1/3/1/8/131871745/nofesubowadixam-tonosu.pdfIn PDF document text
    • http://files.abqyav.com/uploads/1/3/1/3/131383949/2015564.pdfIn PDF document text
    • http://files.kcrollerwarriors.com/uploads/1/3/0/7/130776409/zimupazibib_bujoku_jidowusenu.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/1/0437/3856/2712/files/1370806584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/mudekav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/stream_processing_with_apache_flink_o_reilly_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/4980545054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/dexizukawologegiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4646/0830/files/befojikedet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/xorunugut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/26526963098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/algorithm_complexity_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/86491374077.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 8

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_off00007137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 5672 bytes
SHA-256: 0a9a48d653b13296b5fec65df18d4c2eeaa933dd3caef5478e8ce4363ef1f9b5
font_01_sfnt_off00008493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8493 16296 bytes
SHA-256: 3f1c6d2079affd143693d84f0a85f37d73ebd4f106cbd5215354c4ef64235f3f

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