Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9dc5aea178f342…

MALICIOUS

PDF

38.1 KB Created: 2020-08-22 02:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73dae97db55daf062df027f83ec3cfb6 SHA-1: de20e545b60ad68cc8e9521e2ca933c309afb912 SHA-256: da9dc5aea178f3425f71d93fd69818aea2f6d3d8ccfa204210e43a0fe72d45fa
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flagged a link to ttraff.cc, indicating malicious redirector infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute content through numerous links. The document body contains text related to 'information report introduction example' and the authoring application 'wkhtmltopdf', which are likely lures.

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=information+report+introduction+example In PDF document text
    • http://files.liacuu.org/uploads/1/3/1/3/131398140/fifavatuduxikenoraj.pdfIn PDF document text
    • http://wubanuxub.centralcalclay.com/uploads/1/3/1/3/131380213/rijavatovezo-zopele-tajoluboni-bezilakonusis.pdfIn PDF document text
    • http://verabupol.themontessorinurseryschool.com/uploads/1/3/1/4/131452883/926315.pdfIn PDF document text
    • http://files.gwdayschool.com/uploads/1/3/1/4/131454791/xetemuvadi.pdfIn PDF document text
    • http://files.clarkfamilymed.com/uploads/1/3/2/6/132681772/wotewipuxif-zulebowumovon-luvevegev.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/1/0430/5630/0186/files/97359559241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/baxosikajizivinufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/pesil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/wugiwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/how_to_activate_nightbot_on_twitch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/12885548648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/68366592868.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 4

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_off00005821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5821 5128 bytes
SHA-256: ed7eca69c8de50fac6789457d0fdba6f507fc2ca01be39284916bebb5d8047be
font_01_sfnt_off00006973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 10024 bytes
SHA-256: 7e3143c6edf631997e3867ba33b094154ab6dff902894514cec9445fe5834818

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