Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f570afb8617bec…

MALICIOUS

PDF

38.1 KB Created: 2020-08-13 13:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c6c740b03c0392cc1317443679a851a SHA-1: 3381d85e6f86ec45374117a250b5d9ce4d8e24ce SHA-256: 81f570afb8617bec7298950413886cee4b3e7ab9f8457df72222f418ffc9862c
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a redirector to 'ttraff.ru' which is associated with malicious activity. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic. The ML classifier strongly indicates maliciousness, and the overall structure suggests a lure to a malicious site.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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/wb?keyword=journey%20don In PDF document text
    • http://files.kingofpopz.com/uploads/1/3/0/7/130740178/c67ceb.pdfIn PDF document text
    • http://mewaxe.ourlittlebitranch.com/uploads/1/3/1/3/131398404/2871649.pdfIn PDF document text
    • http://files.cherylvanase.com/uploads/1/3/1/8/131871614/wuperivegol.pdfIn PDF document text
    • https://ttraff.ru/wb?keyword=journey%20don't%20stop%20believin%20piano%20pdfIn 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/1/0428/7922/1919/files/kevusepexemosulebanovob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/cage_aux_sports_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/23543060074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/puvuxederelukorun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/kondisi_perekonomian_indonesia_saat_ini_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/kaba_locks_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8024/3617/files/retinografia_glaucoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/adobe_illustrator_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/gefemojebirololabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/bsc_3rd_year_chemistry_notes_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/bitop.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 2

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_off000055aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AA 5360 bytes
SHA-256: 63272f8972836ce9925c01ea4caac3c878b0fd3f0bdb33aa767ff36190a05e53
font_01_sfnt_off00006800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6800 10364 bytes
SHA-256: 02362dcd2fae61c495bb8624f3f7429dbba367b74d830b55cc54ad55df1ee372

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