Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c87af84f194e01e…

MALICIOUS

PDF

52.9 KB Created: 2020-07-29 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b1e0f129c84a100c1e47bf5e7ba2a20 SHA-1: f1aea153555eae0bd6841ae205e15d806af1e9e0 SHA-256: 8c87af84f194e01e6aa177cf367acaeaaca826cd3eed3bd5ef13b8a1878cfe83
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these links. The presence of a malicious redirector URL indicates an attempt to lure users to malicious sites.

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=tragedia+griega+prometeo+encadenado+pdf In PDF document text
    • http://files.restauranthibiscus.com/uploads/1/3/0/7/130776841/5106130.pdfIn PDF document text
    • http://files.whatmakesagreatschool.com/uploads/1/3/2/6/132695782/6002867.pdfIn PDF document text
    • http://files.mzsacredhealing.com/uploads/1/3/1/4/131406610/7767372.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/1/0435/6263/1326/files/48067960169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/61566691961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/goxekutogoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/84885415625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/31100389834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/daberumuzufiruzape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/40728368301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/21481139829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/96030333250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/vajolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/65269144365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/tadalidezemexinirude.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_off00008365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8365 5004 bytes
SHA-256: 1c79c47653cb3626d3862d5b26f6f7db3d1fdd0a9e472c2231eede16a32d3224
font_01_sfnt_off0000944d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944D 16888 bytes
SHA-256: c2d342df2efd6ab632bf09b8e595f440e73e6da78a567fd0245428ffc98bf83d

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