Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a9acb525058ef7…

MALICIOUS

PDF

47.6 KB Created: 2020-08-10 03:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc1ae980e3be3801740041d84e77c2da SHA-1: a87f296d561a49c295c0b29301a6a74ea7845b93 SHA-256: c5a9acb525058ef7d99cd78952aa5f96de9ff99d9ccf7f659fe19b6c0b26d092
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a compromised site for further exploitation or phishing.

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.ru/pify?keyword=bayesian+methods+for+data+analysis+carlin+pdf In PDF document text
    • http://jagaguxe.coreagritech.com/uploads/1/3/2/6/132681352/zazovelenulexoxufe.pdfIn PDF document text
    • http://files.piltzfamily.waggamatters.com/uploads/1/3/1/8/131871585/1357589.pdfIn PDF document text
    • http://files.synchronicitypc.com/uploads/1/3/0/7/130776159/6048149ac238457.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/1/0438/3604/7520/files/16937207932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/vowisirezidatiguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52567390019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7668/0869/files/sezimamafisesoragojof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/tizekaginedumoferofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/twitter_hashtag_search.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/87460222808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/jodipejujubevezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/wasovux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/los_4_acuerdos_toltecas_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/6969475267.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_off00007aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEC 5544 bytes
SHA-256: 79b00946a8880fa87861418682347af1f30b11a6e034b034a7d8db8044ff169c
font_01_sfnt_off00008da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 10532 bytes
SHA-256: 27e3b307a52eff7e33e296c6e16a4da372118c4835b187a43f063c225468bb14

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