Malicious PDF — malware analysis report

Static analysis result for SHA-256 d536e217159805c3…

MALICIOUS

PDF

42.2 KB Created: 2020-08-15 12:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5326a83c1ae1b17cd9ce70049ef776e SHA-1: efb6bc663e30ddf3d6a548566d01b6269502c958 SHA-256: d536e217159805c32fdf929173615b76f6c6669dd08a4cfff97c8bc597b07603
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/wb?keyword=purposive%20communication%20lessons%20pdf In PDF document text
    • http://nadobe.ourmomentsintime.net/uploads/1/3/1/4/131408899/muvodoreki-zuzojutage-winebazavave-rusosepesamito.pdfIn PDF document text
    • http://files.lampoonprops.com/uploads/1/3/0/7/130776273/6944960.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/1/0431/1613/4562/files/12888315147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/57619033529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/campbell_biology_11th_edition_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/list_reverse_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/gikod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/57364599977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/40429259435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/essentials_of_statistics_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/29396224308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/94778091157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/jufenozadutopuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/carcinoma_do_colon.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 3

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_off00006668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 5364 bytes
SHA-256: 791d1cc95d25b6d585d6cbe2165c9a390862a3c3651d7938fc9cc9e441e291c8
font_01_sfnt_off0000788c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 10524 bytes
SHA-256: 26484dbba0dec7d666926dce64ee13301f7369fd7f74233f0efa4496e012114c

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