Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8cc71b39e6fdd0…

MALICIOUS

PDF

68.2 KB Created: 2020-07-30 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 461d7ce7e7bd5bcc396fb632e99cbfa3 SHA-1: 88f54986fe665be2757a2449fda5035c9569a114 SHA-256: 4b8cc71b39e6fdd0609249ac3267c108dbd36956ace1f7c67538ce5eed933a50
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=social+learning+theories+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to academic content, likely a lure to encourage clicks on the malicious links.

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=social+learning+theories+pdf In PDF document text
    • http://files.galactikonsciousness.com/uploads/1/3/1/6/131637081/zopiratidinuxak.pdfIn PDF document text
    • http://files.137point5bodycare.com/uploads/1/3/0/7/130775387/b1df9b79.pdfIn PDF document text
    • http://files.wcpreschoolva.com/uploads/1/3/1/3/131383954/2722490.pdfIn PDF document text
    • http://files.keeputopiabeautiful.org/uploads/1/3/0/8/130814535/xirote_wunowalemin_kijomat.pdfIn PDF document text
    • http://files.adamhager.com/uploads/1/3/0/7/130740524/19bdbcc11b.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/1/0433/5930/5880/files/bivoxaforalupuzagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/vapeximukotowisuxojawof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/95491009207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/birafelilapixaselimaveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/regiwugisopave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/5356724392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7722/8957/files/noxifapipaliruxofabulati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/22332782065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/patebekomarabujurugaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8333/files/rotexul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/10416357281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/salimuvedepadomufitoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9249/2963/files/mejaruzakadudojavemipun.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_off0000cee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE5 5308 bytes
SHA-256: b7024f6a91a6cbef0ad72c43c0e61dad44d009974b0fb6d594fc6e2337f1cf38
font_01_sfnt_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 10140 bytes
SHA-256: eaaa2d567a87d77ac61dcca0da4095712ac73e7ebb8119a9482ef5fe0dfdf1e2

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