Malicious PDF — malware analysis report

Static analysis result for SHA-256 758b7a6ded0c3c3b…

MALICIOUS

PDF

50.2 KB Created: 2020-10-29 01:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bcfa5f991d5cbde8fd831a736476f37 SHA-1: bd115a03ee0421292e9cb9977ab48a185ba9e882 SHA-256: 758b7a6ded0c3c3b49ea5754c8bd28ce0291e0808c100833295f4d7dea8446db
154 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.com/123?keyword=bedford+memorial+school, which is flagged as malicious. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is inferred from the PDF_SEO_LINK_FARM heuristic and the general nature of such documents, likely used to facilitate the redirection or host further malicious content.

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/123?keyword=bedford+memorial+school
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/8533731.pdf
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/83148510c7b656.pdf
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/wejamilugamow.pdf
    • https://pedutiwoda.weebly.com/uploads/1/3/4/4/134481784/838b609cceea2ea.pdf
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wanim.pdf
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/gubozom.pdf
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/rigul.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/powobisel_daxovelekifadad_bafelitom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0496/5639/7987/files/contract_killer_2_apk.pdf
    • https://uploads.strikinglycdn.com/files/c305cc06-cc6f-47d5-b6de-50f780f35129/rf_power_amplifiers.pdf
    • https://uploads.strikinglycdn.com/files/709bdf6e-aefb-4152-a579-f6afd31ff2ad/best_buy_toshiba_chromebook_2.pdf
    • https://uploads.strikinglycdn.com/files/f4facae7-93bf-4549-8e9a-deefa6e47dfc/naveberuxogatelud.pdf
    • https://uploads.strikinglycdn.com/files/9e24a7d7-47b8-41e3-a009-641d8edbe0a4/ingenieria_economica_riggs_bedworth.pdf
    • https://uploads.strikinglycdn.com/files/a781ebe4-435f-4899-b09f-0ffe4bf1034c/98269659219.pdf
    • https://cdn.shopify.com/s/files/1/0483/5799/8743/files/lajematatemebuz.pdf
    • https://uploads.strikinglycdn.com/files/15fea94a-b7ab-486f-8164-5083cc8b1f0b/bomiv.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_off00007986.bin
1890899726331380e83b886036f8121045e3c3c007ec1729a07286de572a99ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 4912 bytes
font_01_sfnt_off00008a26.bin
75bbbb3470f0a1c9a5e2461c18815307c205396a1f28fda7c23c85a1479927fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A26 10544 bytes
font_02_sfnt_off0000ae03.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE03 4324 bytes

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