Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1628b8ff1918cbc…

MALICIOUS

PDF

46.9 KB Created: 2020-08-26 20:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e61781db1a12ef629822240f576568d SHA-1: 9c228f8c21800a0258e8c99e71968c783dfc98ab SHA-256: e1628b8ff1918cbc3ff10761c0bd80bd4592514afd998aea45ee09648fe5359b
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 directs users to a known malicious URL. The document body, though partially obfuscated, contains text related to 'Hespori fight guide osrs' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, one of which is a known malicious redirector.

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=hespori+fight+guide+osrs In PDF document text
    • http://files.saltysirentradingco.org/uploads/1/3/1/3/131379039/5377148.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/1/0435/4136/4890/files/relate_the_polarity_of_a_molecule_to_its_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4297/0527/files/fekesimuwanudikegusolame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/ben_10_tamil_movie_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/bonfiglioli_gear_motor_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/pikakepedavitifajuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/55610278586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/50745324754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/23933242514.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000063ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5020 bytes
SHA-256: 58ba278b52e8255395360ea727ac7709cbcd2760e8d2eadd43f36773c4d7aed6
font_01_sfnt_off000074cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 10868 bytes
SHA-256: 15c1813ed4faf7605cfe4a45e0be429872d4131904633e752b6e045192034ef1
font_02_sfnt_off00009a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A21 16112 bytes
SHA-256: 23e5e0a6ad5360bf10628433507e5aab34c42d7d900ccb2a5214949f2168b422

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