Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4afa6549b6ece4…

MALICIOUS

PDF

40.2 KB Created: 2020-08-02 12:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3089767de6f960f8e72a63e21a47063e SHA-1: 685c52b3cdbaf7ec5d4a2273d2bf40255619f1a9 SHA-256: da4afa6549b6ece49ae3704e5bbf218d925171ea0a88aa0e4425e836233ec11e
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though corrupted, contains text related to a 'free pdf editor app for android' and the malicious redirector URL, suggesting a lure to a malicious site.

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=free+pdf+editor+app+for+android In PDF document text
    • http://files.thebarmyfox.com/uploads/1/3/2/3/132303010/xivomuviluj.pdfIn PDF document text
    • http://files.anastasiahronis.com.au/uploads/1/3/1/4/131484603/zolujojewivokap_gibizolidezimik_zadazito.pdfIn PDF document text
    • http://files.heirloomwoods.net/uploads/1/3/1/4/131437513/miberi-lujinik-fafolezuz.pdfIn PDF document text
    • http://files.namkenag.com/uploads/1/3/0/8/130814003/kobewigaru.pdfIn PDF document text
    • http://files.czerral.com/uploads/1/3/1/6/131637546/lijase-dipabapuxuranol-xakixikor-mobep.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/1/0432/9652/2398/files/1725794149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/xexagajegowunakuzalak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/27050836001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/segejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/1317563575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/vobewibitubiropivomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/kelekunojavamelawozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/27538947727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/26630076167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/14574354476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1500/4582/files/27863680754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/15438711835.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
🗂 Part of campaign: anastasiahronis.com.au 3 samples

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_off00006156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 4780 bytes
SHA-256: 17ea22f970727f70d9d690aeb5ab45cc670225417909d15e545177dfc9feafcb
font_01_sfnt_off000071aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 10020 bytes
SHA-256: 9f5a5245909f120e366ca7bade93382513685e237cc39d2973b5cca09cb495e1

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