Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33aae76ea5e864e…

MALICIOUS

PDF

43.0 KB Created: 2020-08-25 04:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfa8fe32593fba03674456a88ae3d723 SHA-1: 513d0c8af9a4a78274d4467548daf823f61043de SHA-256: c33aae76ea5e864e935f3f605cada9ea36c65dde3d957455593c157e99438165
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for SEO spam. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the file is part of a phishing or spam campaign designed to drive traffic 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.ru/pify?keyword=airtel+nigeria+apn+settings+for+android+4g In PDF document text
    • http://files.kodaliners.com/uploads/1/3/1/4/131438190/9633671.pdfIn PDF document text
    • http://files.321letshavefun.co.uk/uploads/1/3/1/4/131407148/xomobeguvebudexa.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/1/0427/9782/6207/files/30753209292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/lojagovaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/killing_the_black_body.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/68139814950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/xebop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/asme_y14._5m-_1994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/ropudik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/sexirimivim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/pneumonia_aspirasi_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/vosuziwuzonalawikopejogel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/tokofaweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/an_introduction_to_agricultural_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5080/3095/files/cee_lo_green_height.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 5

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_off00006c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5284 bytes
SHA-256: 482b69b889e49bc0d2aa7c3ef45b33082ac57d49e5d8d06c0908969833f7e0e1
font_01_sfnt_off00007e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 9648 bytes
SHA-256: b525525cee982b761fcd2f87396cbde16a554e4397836dd380e57b25d686b7f0

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