Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc6ba1fa7d9a2f7…

MALICIOUS

PDF

36.3 KB Created: 2020-08-18 21:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5438f19f0dcc5d849c48016270284af5 SHA-1: 31a40307f8b3d0763951ae434d18861f3a2e6be4 SHA-256: fdc6ba1fa7d9a2f7656952cd37373cd6a08f53fd76565974b12170624e275b95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with many pointing to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure, suggesting a malicious intent behind the link farm. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, further supporting the malicious link farm hypothesis. No scripts were extracted from this sample.

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.ru/pify?keyword=conditional+songs+esl+worksheets In PDF document text
    • http://files.petetherockman.org/uploads/1/3/0/7/130775892/rowixaxorixuninebopi.pdfIn PDF document text
    • http://bupegi.snipersboosters.org/uploads/1/3/0/7/130775654/bebewirem.pdfIn PDF document text
    • http://wewifow.therapistsmap.com/uploads/1/3/0/8/130814328/8530a706.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/1/0437/0595/8565/files/adobe_after_effect_cc_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/gokivagez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/14963314741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/cleenol_lift_wax_free_polish_data_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/fuwugerulijulonapako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/17958246786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/rijilejek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/fepewiwimusikopupem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/kawaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/fire_suppression_systems_for_server_rooms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/bootstrap_website_templates_github.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 4

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_off0000508b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508B 5148 bytes
SHA-256: 6e4fc7e199bd0ec916f618b2d9a0c3f7ff38ca8dcdf2b41a48777035f21c2221
font_01_sfnt_off0000621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 10228 bytes
SHA-256: 82bf9dfb7b1184216e8d2828a28ebfa3ab4c248e221e699acb8112c1eae894fb

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