Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1187aa1568dd2c3…

MALICIOUS

PDF

47.8 KB Created: 2020-08-22 01:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb9ace26d227485eaf860b14bceedd83 SHA-1: 4d2c5f7986de6cf519017d4045e58f33b86d205b SHA-256: b1187aa1568dd2c3026685906e032f90a4033f82fba9add2756fc24c63d051ab
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'types of dogs' and a URL that appears to be part of an SEO poisoning or link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=types+of+dogs+94+percent+game+answers In PDF document text
    • http://files.customdivingservices.net/uploads/1/3/0/8/130873894/pofonisuteda-liwex.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/1/0432/9809/5272/files/gunebazorofumaterawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/pharmaceutical_buffers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/nonewarazerate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/81992762291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2211/3192/files/pulemororo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5330/1150/files/kemuzunipinekapesuteziju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/citadel_color_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/48133838941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5975/6702/files/tupirowutemujedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/97874952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/wulakaxipepejasuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4649/3591/files/blockchain_dns_firefox_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/4166420223.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_off00006461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 5828 bytes
SHA-256: b37cfc9e8739e63924026d294803412440ae6513c6028a4f86718305e4f40f84
font_01_sfnt_off00007848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 10360 bytes
SHA-256: 13bcde68e6cfb8eb012813a04a210b0020dfcd3e33a5bd2d8554d4dbeee9d470
font_02_sfnt_off00009be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE8 16376 bytes
SHA-256: 4954ddec54c61b6acc7eddbac306bc890d05f3afdfcf3ae890c7612da0a7d668

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