Malicious PDF — malware analysis report

Static analysis result for SHA-256 479b01a8dedbcc2b…

MALICIOUS

PDF

86.4 KB Created: 2020-07-31 02:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90d0bf44bc343bf1043b1dd1e819230a SHA-1: 314babcb32f6ac7742bef49da0a22c6d3280b62f SHA-256: 479b01a8dedbcc2b16eaa374d938ceff9669a1968eaf006a32c5606d649b4118
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Cervantes don quixote pdf'. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary IOC is the redirector URL used to funnel victims to a malicious site.

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=cervantes+don+quixote+pdf In PDF document text
    • http://files.playtherapyworks.com/uploads/1/3/1/4/131414743/pofukabexi.pdfIn PDF document text
    • http://files.betterbowlsbako.com/uploads/1/3/1/0/131071253/9396945.pdfIn PDF document text
    • http://files.asmuyaocommunityschool.com/uploads/1/3/2/7/132740743/324409.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/1/0436/1561/7182/files/20186633458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/21607339680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/27655675563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/77573454276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/rewamifadusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/8872540184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/68973839187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/ruxawenijixejudakoduvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/70856198674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/26575931087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/65588017085.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_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 5164 bytes
SHA-256: 79ecfcaf65a713880eadc8e477d9f00ed2336690bd4be99f9214132f50a912bc
font_01_sfnt_off0001243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 11968 bytes
SHA-256: c6278d386b8437550bd52161a7899227cabb6a3c9fab38a288c9b8061de7805b

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