Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c141a8b1ee38d8d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eae9e1188ec96c3e293ae3c11839cb94 SHA-1: 0de0689972a9e479226031ed51f77baa1215b15b SHA-256: 0c141a8b1ee38d8dade58b13971e7e545c2c39638d37490c21f358753184ac1c
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document's content and structure suggest it is part of an SEO link farm designed to trick users into downloading potentially harmful files. The ML classifier strongly indicates maliciousness, and the presence of redirector links confirms a malicious intent to lead users to harmful 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=88+ball+pool+apk In PDF document text
    • http://files.castironbrighton.com/uploads/1/3/0/7/130740524/9558521.pdfIn PDF document text
    • http://files.whiskeybenttradingco.com/uploads/1/3/0/7/130775912/d33d1fc87e2c.pdfIn PDF document text
    • http://files.renewca.us/uploads/1/3/1/8/131857494/sixajadisunipi_zubowugulufi_zafodijifu_jitor.pdfIn PDF document text
    • http://files.reikiwomb.com/uploads/1/3/1/4/131453535/6fa7393adb90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/lakexuxedisezov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/diloguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/1619043215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/52162893764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/js_force_html_redraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/63586533799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/89970432729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2471/0807/files/1st_grade_math_worksheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/44618308861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/definition_principles_and_scope_of_environmental_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/87069942777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/nukexijonogatoretad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A3 4276 bytes
SHA-256: 7950b17fdb4c25aeb1c0f4ea5ea145c69ea6cfba9f0c3b84228cf048be018fc8
font_01_sfnt_off0000680c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 10232 bytes
SHA-256: 46e0b88761ad67c2196d85a164ff53a5fe13d6202a2a9808ace7453a4cd5b9ba
font_02_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34