Malicious PDF — malware analysis report

Static analysis result for SHA-256 178cfce605c80e6d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-14 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3d84f65bf793c3522a2c14924fab712 SHA-1: 1432c62a84d4c97cd3c072ccd7c677def5f88848 SHA-256: 178cfce605c80e6d1bff79a0e67b4ee5ed2fa0afab7e03e6ee69569c38b19c74
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed for SEO spam and phishing. The document body, though partially corrupted, includes the text 'amu application form 2019 for class 9' and a URL, suggesting a lure for users to download further malicious content or engage in a phishing attempt. The ML classifier strongly indicated maliciousness, and multiple heuristics fired for malicious redirector links and SEO link farming.

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=amu+application+form+2019+for+class+9 In PDF document text
    • http://files.muscatdogadoption.com/uploads/1/3/0/7/130775612/xukamiveleroj-gowuwaminadiz-noduxuf.pdfIn PDF document text
    • http://files.daisychainkinsale.com/uploads/1/3/1/0/131069934/komezonugetebawum.pdfIn PDF document text
    • http://files.taiwanbeaches.com/uploads/1/3/1/3/131379894/3194218.pdfIn PDF document text
    • http://zekakix.westernhorseclub.com/uploads/1/3/1/3/131380213/xebenof.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/1/0438/9083/5624/files/bododekugiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/digosotasotibimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/ashrae_1972_handbook_of_fundamentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/poetica_aristoteles_garcia_bacca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6150/1334/files/73014528701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/if_nicolas_bourbaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5809/files/aritmetik_ortalama_ve_aklk_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/nosufududagiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/calculate_angle_between_two_vectors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5837/8392/files/54344734697.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 8

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_off000063e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 5632 bytes
SHA-256: bd3db171fe581b10c87c0976da0c6228ce21107fe6ab0f946daab6abffc4a3bf
font_01_sfnt_off000076e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 10192 bytes
SHA-256: 5308e525cbc3f8cf8f88b9a738c02049a57dfe2ec5750a3dac43c13c620a04e0

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