Malicious PDF — malware analysis report

Static analysis result for SHA-256 8839e3a5a7f537e5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 02:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf1c804879b6205adbe0dd4c1e07fff5 SHA-1: ad961c128d40d00ffd059475c6d00b301045fded SHA-256: 8839e3a5a7f537e50e0bf1a33b4281e07053928c86e6a0dc47052ce8720cbdfa
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised as a manual for a Sony camera. The heuristic firings indicate this is a malicious redirector and part of a link farm, likely for SEO-based phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=sony+camera+a5000+manual In PDF document text
    • http://files.tohsthecenter.org/uploads/1/3/1/3/131379923/7845369.pdfIn PDF document text
    • http://files.nestbpt.com/uploads/1/3/0/8/130874161/d5f78f2e.pdfIn PDF document text
    • http://jebejun.therobertabadydogfoodcoltd.com/uploads/1/3/0/7/130776485/e401c0459.pdfIn PDF document text
    • http://nepix.alazhartemple195.org/uploads/1/3/2/6/132681670/6798690.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/1/0431/1829/7245/files/absolute_phrase_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/factorial_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/nobijimabukumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/xapelolawotikemejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/utorrent_free_movies_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/lewopomoworupeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/35540081496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0325/6737/files/catalizadores_en_quimica_organica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3885/8650/files/78445006642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/laresos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D2 3776 bytes
SHA-256: 7abee62b52f2f5c79443d0e7cb432644f7437fbc466beaf7cc6d102eff3a4b64
font_01_sfnt_off00006261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6261 5240 bytes
SHA-256: 561beae39a630c2086230ec4d4fa7bc9a9f1b6563b3b31759dddbc4872f296c2
font_02_sfnt_off00007418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 15632 bytes
SHA-256: 7b2c359e7b96d450d506122c103de56b2603d6bde95b53b4ab8da5a031173c15

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