Malicious PDF — malware analysis report

Static analysis result for SHA-256 390251b4bd9acf69…

MALICIOUS

PDF

47.5 KB Created: 2020-08-03 21:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99f2804e9554b5c4fd7e163c112a3d62 SHA-1: 763863bc0a52abb11335e0fc8ca73d1d7da4860b SHA-256: 390251b4bd9acf6941185b17d4c22caa3bfd8d3e77d5a13e4b9a2a61a0d8f2e4
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'microstrip antenna theory pdf'. The link, https://ttraff.cc/pify?keyword=microstrip+antenna+theory+pdf, is a known malicious redirector. The document also contains a large number of other links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=microstrip+antenna+theory+pdf In PDF document text
    • http://files.j9wise.net/uploads/1/3/0/9/130968947/pedajilona_midapulufep_timibav.pdfIn PDF document text
    • http://files.shirlarae.com/uploads/1/3/1/1/131163957/kasasigabo.pdfIn PDF document text
    • http://files.vintagecycling.org/uploads/1/3/2/7/132712355/f03148.pdfIn PDF document text
    • http://files.thesanctiflychick.com/uploads/1/3/0/7/130739831/2782723.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/1/0430/3811/3955/files/todalilidipesijitaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/gulotelonimonud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/fracture_mechanics_anderson_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/16781844247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/78047915534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/docker_run_ubuntu_bash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/79202619235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/xupipulax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/fajivijefalaxole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/bulefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/mojegubigotimivu.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 6

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_off00007bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 5316 bytes
SHA-256: ae88d3da23ff216e0389ab00a8db941b3edbde34ca25282ae06c19c4af719349
font_01_sfnt_off00008de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 10140 bytes
SHA-256: 5739a3a0566c24e835f9219b4eac9fb7585a18ae1b3589ca0f77b39a3340b898

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