Malicious PDF — malware analysis report

Static analysis result for SHA-256 88062f721a264e56…

MALICIOUS

PDF

44.8 KB Created: 2020-08-06 04:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d379790e1e21f583fe8f1d15ce99210 SHA-1: 706050fc9ec8fdcd013a06cd8e976b30b3b45563 SHA-256: 88062f721a264e560388ba0ed3171d9ee3a5fdf218bd0de7f6adc3e55773f602
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to worksheets and includes the malicious URL, suggesting a lure to download potentially harmful content. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to a phishing or malware distribution scheme.

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=perimeter+and+area+of+plane+figures+worksheets+pdf In PDF document text
    • http://files.consideryourselfwarned.net/uploads/1/3/1/6/131607163/1901786.pdfIn PDF document text
    • http://kizexomer.geoffalainllc.com/uploads/1/3/1/6/131607062/795be.pdfIn PDF document text
    • http://files.mentaleclipsetheater.com/uploads/1/3/2/8/132814958/1421345.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/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/fuvipudoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/71794242816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/zejofosov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/perexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/pumejozexabijiwamuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/zetorakabewokuridamizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6384/files/38406978307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/90151999542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/desanurasaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/rafeluxuwaxota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/lonekedarezogizido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/jatitowuzepujedaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/arduino_i2c_scanner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4664/7446/files/la_peste_albert_camus_livre.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B44 5612 bytes
SHA-256: 6241abf79d74e08f938d8c76e2268e1a84be262a804c48fb3ebe8e103b644374
font_01_sfnt_off00006e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 9956 bytes
SHA-256: b8ee1f831666ac8b7a07d8828ff4ce340101035f00bad52f7ec7510a6428b9ec
font_02_sfnt_off00009085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9085 16116 bytes
SHA-256: 73880e79b460d8357fde832bf5cc58d8e7a3b3b3a063c1e5ecd232e568756796