Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c8bf81dfa97aae…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 11:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c8bdc7b85ee9053e6b437109186ca7e SHA-1: 180dc1e9db18b3e3084af285ff102112cf27a98a SHA-256: b0c8bf81dfa97aae745837b9bbdfb7e5433332113228eee1e6bca9dd40c824db
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the string 'Gasiorowicz quantum physics pdf', likely a lure to entice users to click the malicious links. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a high likelihood of 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.cc/pify?keyword=gasiorowicz+quantum+physics+pdf In PDF document text
    • http://files.waasfamilygarden.com/uploads/1/3/2/6/132682919/pigefapirasi.pdfIn PDF document text
    • http://files.adelanteawards.com/uploads/1/3/1/4/131406785/dofobur_lifemov_temos.pdfIn PDF document text
    • http://files.estellebrown.shop/uploads/1/3/0/9/130969403/f615d0b6805b.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/1/0430/8602/0761/files/tixeboxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/kolanubef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/22195264980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1770/7425/files/vefiripavelemogevowufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/55256399257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/bunukojevas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/zegolilipekeraveto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0198/6723/files/83911185303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/19515450494.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 1

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_off00006427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6427 5764 bytes
SHA-256: 1ac93ef2d73d3044937263b4132b2587c5e44b97d9be270bbbf15f37e1200167
font_01_sfnt_off000077c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10092 bytes
SHA-256: 28909bb2f3ea003622fa8c9f2f5a15c0a7ff5ab5299ac8d819e3380190b9ab45

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