Malicious PDF — malware analysis report

Static analysis result for SHA-256 625657cd3a290161…

MALICIOUS

PDF

52.7 KB Created: 2020-08-06 23:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 130cf897d3f4e7b72c45361d92bd37cd SHA-1: f0fb6dbfff33c038cd2a24b17334346f9f5e382e SHA-256: 625657cd3a2901615fee57fc6c46ac28cbe54a2f1386368f5d148f594c5ac576
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, designed to lead users to external links. The document body contains a URL that points to a known malicious redirector, likely intended to trick users into downloading further malware or visiting a phishing site. The presence of numerous external PDF links further supports the SEO link farm tactic.

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=the+black+cat+edgar+allan+poe+pdf In PDF document text
    • http://files.hrstaffnstuff.com.au/uploads/1/3/2/8/132814071/xawabatunefusezuw.pdfIn PDF document text
    • http://files.mackaydoula.net/uploads/1/3/1/8/131856205/79b1f.pdfIn PDF document text
    • http://files.hazencuyler.com/uploads/1/3/2/6/132681749/lugurajupufirigaru.pdfIn PDF document text
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131453100/5271413.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/1/0429/7955/7529/files/ruwamaxexepan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/64489016124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/angiogenesis_cancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/sosuvoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/janobol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/xegada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/16413772451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/kukowodaxabilozerur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/acer_nitro_5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/30596303782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/world_edit_bukkit.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_off000091e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E4 5392 bytes
SHA-256: 0f52f0d156a71c13d1fa3a0d0c4e4f2df511a3efaed7ec03c36865fcddfeed11
font_01_sfnt_off0000a42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA42E 9772 bytes
SHA-256: 9ad86dcb06917ee4efad1337e007cb64fbac79cb35fb3686a9fc28794b1444a6

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