Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cbf78041a5803c…

MALICIOUS

PDF

52.4 KB Created: 2020-07-20 11:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4af939e4b313cb7ff19a8709d5ae70a0 SHA-1: ad5a01464189322e47cd578d16dd29262a368dd0 SHA-256: 29cbf78041a5803c753d5ecd0727b80f676fd39da7b3753b2cc07710c91c635f
234 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=stress+and+strain+curve+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, suggests a lure related to 'stress and strain curve pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=stress+and+strain+curve+pdf In PDF document text
    • http://files.nadiaohsp.com/uploads/1/3/1/0/131070394/9dc88a3c799e0b.pdfIn PDF document text
    • http://files.stjohngreenvilleohio.org/uploads/1/3/0/8/130814052/zumipanujibupef_vubokiva_bibowebapi.pdfIn PDF document text
    • http://files.creativenationnonprofitcorporation.com/uploads/1/3/1/8/131856770/3242748.pdfIn PDF document text
    • http://files.btwmovie.com/uploads/1/3/0/8/130873717/xufezarepeboxo.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/1/0432/8154/7424/files/55536432708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/vepirodonazevebumidepivel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9435/8681/files/18631711286.pdfIn PDF document text
    • https://migowakowos.files.wordpress.com/2020/07/90013883464.pdfIn PDF document text
    • https://loribomijo.files.wordpress.com/2020/07/lilev.pdfIn PDF document text
    • https://kenubid.files.wordpress.com/2020/06/mujisodibejiziwogafonate.pdfIn PDF document text
    • https://wanakuwofo.files.wordpress.com/2020/07/10766735660.pdfIn PDF document text
    • https://refifiv.files.wordpress.com/2020/06/32082570047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/numuleweliramumod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/91257248928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mudamizoxudaxusuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/17572942042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/kevidixomojufifaxupasib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/pubazaxekopitegodulaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B06 5052 bytes
SHA-256: ce5f78b003586b68fe9622e40260801f4cdff776620660149110604ba50e2175
font_01_sfnt_off00008c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C42 10168 bytes
SHA-256: 26cbdb6abc6c73212a5858e238d382cdf5307fb361e401c383cc4e41f1e0ddd5
font_02_sfnt_off0000af4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4D 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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