Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd5b5f02dc41c1b…

MALICIOUS

PDF

50.1 KB Created: 2020-08-16 18:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16b6c9631618351697ce8dc380157f47 SHA-1: 227357334677d61313bebb645d7bbc8b3ae470f9 SHA-256: 5bd5b5f02dc41c1ba8df0c61c8bb23e9eba5dbe90fefcc26b442f50ccae2cd86
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.com/pify?keyword=exponential+inequalities+worksheet+with+answers`, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure to download further content. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the use of redirectors and link farms for malicious purposes.

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.com/pify?keyword=exponential+inequalities+worksheet+with+answers In PDF document text
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdfIn PDF document text
    • http://waxufuso.amadeussalem.com/uploads/1/3/1/3/131383982/6389897.pdfIn PDF document text
    • http://files.mistergteacher.com/uploads/1/3/2/6/132682919/932b219b.pdfIn PDF document text
    • http://files.corderovasquezlab.com/uploads/1/3/1/0/131071253/jewawebasenov.pdfIn PDF document text
    • http://files.joeslodge.marketingfactorygroup.com/uploads/1/3/0/7/130739696/fisaduw-xidatejuwupadet-nopev.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/1/0435/1878/7736/files/wuwubirilonoxosixidanizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/academic_journal_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/56019364630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/l_argumentation_juridique_stefan_goltzberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/kotavagari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/ecosistema_bosque_humedo_tropical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/american_english_file_1_first_edition_teacher_s_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/python_syslog_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/balogh_mary_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.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_off000063a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 5216 bytes
SHA-256: 028bc2ce3e30d9978e8f626bf9e2944e3f2d71b12617ceac310d659fb593ce9c
font_01_sfnt_off0000756e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 15220 bytes
SHA-256: 1f9868eb36b60e248c9c52c052aed4245b50f9eaec0934d45d0081b3205fdb27
font_02_sfnt_off0000a58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA58F 16216 bytes
SHA-256: 1c096a5399d210d3e4aad6eb52831a0090363eed99346ec1fd0bff994b5121a1