Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78a9ab4728688fc…

MALICIOUS

PDF

50.4 KB Created: 2020-08-03 13:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2e3af420e3685c5068d1809b227450c SHA-1: 8db1879db5ae5e268bc2d2606313bd92f7f2b26d SHA-256: c78a9ab4728688fca29e02e71477b451653bb710ba132bf578a5595e24b8a487
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure related to 'Adobe after effects cs5 tutorials for beginners pdf', which is likely a deceptive title to attract clicks. The presence of numerous external PDF links, many hosted on Shopify, points towards a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing pages.

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.com/pify?keyword=adobe+after+effects+cs5+tutorials+for+beginners+pdf In PDF document text
    • http://files.customweddingringsmelbourne.com/uploads/1/3/1/1/131164063/mefumedasel-bizirizovez.pdfIn PDF document text
    • http://files.notsuchsecretlife.com/uploads/1/3/0/8/130813458/4828466.pdfIn PDF document text
    • http://files.hungtaolin.com/uploads/1/3/2/6/132681336/muxezuvebewix_luraludetivo_jaxume.pdfIn PDF document text
    • http://files.thomascreekbaptist.com/uploads/1/3/1/6/131636692/noxaruzafo_wupopatizin.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/1/0433/8457/0019/files/72095822626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/47689012738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/kuloguvumoposujes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/35602921461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/febofiwisumogexuraxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/55425933668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/biwalotudozufukagubazow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/80913851160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/71585935073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/73443077921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/78127556603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/dexinibivesike.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_off00007dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD4 5576 bytes
SHA-256: df7d9149bf868ef52066de5969ec8011a9ad7138b21d4643ad413b2e874b8d07
font_01_sfnt_off000090df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DF 13924 bytes
SHA-256: e0ca7a5dfce7783051b892de9ccbfa7ff398c11f2cc7c0f9ba2f5930d4604713

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