Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28e6c4ea62ce808…

MALICIOUS

PDF

57.0 KB Created: 2020-08-22 14:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4df748245d5af1c502b95a0efd08561a SHA-1: 4b5822cd598a87a4b7cd9cd9ccf5e9f31e936e83 SHA-256: b28e6c4ea62ce8087efdd2d94cfa596771e6fc6b44b003ada6fe7a75d554ee18
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it links to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, with the primary one being a Shopify URL. The document body, though heavily obfuscated, contains text related to a travel guide 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=huangshan+china+travel+guide In PDF document text
    • http://files.christopheroflaherty.com/uploads/1/3/1/3/131398025/30933.pdfIn PDF document text
    • http://putojipeg.texasgulfrecord.org/uploads/1/3/0/7/130775478/vuxoworazaziw.pdfIn PDF document text
    • http://nafawiva.artclasskb.com/uploads/1/3/0/7/130739678/757329.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/1/0433/2906/1032/files/poreluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/17231508126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/amadeus_altea_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/65076391158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/mubigilanetigisag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/77804134147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/25307772212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/tratamiento_para_bartolinitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/toganalob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CC 15112 bytes
SHA-256: 9480da5ac9aa6041ed87924d52e482585c1a782e7e7da7a70c8c9e38934e2cdd
font_01_sfnt_off0000a0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B9 5220 bytes
SHA-256: f206d13e908398a24e1338c9f5e87e91ec0fb2799e89e890ef11e50a4e17b51f
font_02_sfnt_off0000b26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26C 10256 bytes
SHA-256: 5c450ea718a789bc96dbf878de7e49e49159c032c807fa787a882b233d62b275

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