Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d4c8060c8ccc24…

MALICIOUS

PDF

53.0 KB Created: 2020-09-11 23:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11a05068d4ba176802ea8df8c85e2585 SHA-1: c460d4f44b13f40ab0d8fe5592e694a4f7578e6c SHA-256: a8d4c8060c8ccc242325ac4d4e96b03b86a4b89c231aa21c99a4927fac2cf252
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. Several of these links point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the 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.link/pify?keyword=gloomhaven+elementalist+character+sheet In PDF document text
    • http://files.pollinatorsnativeplants.com/uploads/1/3/0/7/130775712/d254a817fbb59.pdfIn PDF document text
    • http://files.webblox.com/uploads/1/3/2/7/132712483/ligafapojewiluzume.pdfIn PDF document text
    • http://files.abodobusinesssolutions.com/uploads/1/3/0/9/130969681/gezopobobujija.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/1/0428/5346/6271/files/changeling_the_lost_2nd_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/veperuvizesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/6735494837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/teri_yaad_saath_he.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/pdf_color_to_black_and_white_converter_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7300/3935/files/70809127385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/33332986640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/ruwota.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b3f46_f13f8a7f9b1a4e4aa2fc5066583408a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d078420971214a67ad774ede501d4b52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a474dd_d76a1821af58420caa5bc607a2d404a9.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 7

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_off000093a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A7 5132 bytes
SHA-256: 52e2c348ea4fb453e975b42e49bf4b648f475e055456165a25c6b5ddb6b08f68
font_01_sfnt_off0000a4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F5 10044 bytes
SHA-256: 386eefff36cbbf29719db6c481b660d7fd0238dc745c47b8725940a4d7546c37

Open this report in the interactive analyzer, or submit your own file for analysis.