Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf2afd4c988c26f…

MALICIOUS

PDF

50.6 KB Created: 2020-08-22 23:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4c8ba63523798778c00dbd694126466 SHA-1: 5029d599fdb63473f0122027bf05fcbaf5ae5442 SHA-256: 5bf2afd4c988c26f7eeadb2b4d1a2878e897380549e8ab2aab9aa8afa32a1f4d
154 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 external PDF files hosted on Shopify. The primary link, however, directs to a malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=dragon+nest+farming+guide+2019
    • http://julesu.endofbelief.org/uploads/1/3/2/6/132683438/xebajadobefesa.pdf
    • http://files.stfrancisxavier.org/uploads/1/3/1/1/131164350/cd439c4d69e0ce6.pdf
    • http://rizutasu.unessec.org/uploads/1/3/0/9/130969723/4990265.pdf
    • http://files.unifiedtaekwon-do.com/uploads/1/3/1/3/131380292/nodokisovutukadoz.pdf
    • http://files.literaturescribes.com/uploads/1/3/2/6/132696117/xatugalebum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/51258233347.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/96720182076.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/92942247807.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/natijexulojaguxajel.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/414295279.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/jakadivadawomowuvuxowox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/puzuwagarekewogipabowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/zogug.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/noxegudotizixojuluwate.pdf
    • https://cdn.shopify.com/s/files/1/0431/1043/2930/files/best_buy_on_computers_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/directv_hr54-_500_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b51.bin
416345d832f680768b08b3d805127197f6f0c98ff56f1493a1c3aaac0cf0e9dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 4812 bytes
font_01_sfnt_off00007c25.bin
05081cc375d9d9566e31ef4118acfbb2e1f22ddddcedb849be456c8688881196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 5676 bytes
font_02_sfnt_off00008f5d.bin
b0c70c8bba0bd2ffe85a90177d75b08d7e61d4dde13171281277986fc2b222a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5D 14744 bytes

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